Substances and articles (except aerosols and chemicals under pressure) of Class 2 which are not mentioned  by name in Table A of Chapter 3.2  shall be classified  under a collective    entry listed  in
2.2.2.3 in accordance with 2.2.2.1.2 and 2.2.2.1.3. The following criteria shall apply:

Asphyxiant gases

Gases which are non-oxidizing, non-flammable and non-toxic and which dilute or replace oxygen normally in the atmosphere.

Flammable gases

Gases which at 20 °C and a standard pressure of 101.3 kPa:

(a)    are ignitable when in a mixture of 13% or less by volume with air; or

(b)    have a flammable range with air of at least 12 percentage points regardless of the lower flammable limit.

Flammability shall be determined by tests or by calculation, in accordance with methods adopted by ISO (see ISO 10156:2010).

Where insufficient data are available to use these methods, tests by a comparable method recognized by the competent authority of the country of origin may be used.

If the country of origin is not a Contracting Party to ADR these methods shall be recognized by the competent authority of the first country Contracting Party to ADR reached by the consignment.
 

Oxidizing gases

Gases, which may, generally by providing oxygen, cause or contribute to the combustion of other material more than air does. These are pure gases or gas mixtures with an oxidizing power greater  than 23.5% as determined by a method specified in ISO 10156:2010.

Toxic gases

NOTE: Gases meeting the criteria for toxicity in part or completely owing to their corrosivity are to be classified as toxic. See also the criteria under the heading "Corrosive gases" for a possible subsidiary corrosivity hazard.

Gases which:

(a)    are known to be so toxic or corrosive to humans as to pose a hazard to health; or

(b)    are presumed to be toxic or corrosive to humans because they have a LC50 value for acute toxicity equal to or less than 5 000 ml/m³ (ppm) when tested in accordance with 2.2.61.1.

In the case of gas mixtures (including vapours of substances from other classes) the following formula may be used:

LC    Toxic (mixture) =   
 
 
 

where    fi    =    mole fraction of the ith component substance of the mixture; Ti    =    toxicity index of the ith component substance of the mixture.
The Ti equals the LC50 value as found in packing instruction P200 of 4.1.4.1.

When no LC50 value is listed in packing instruction P200 of 4.1.4.1, a LC50 value available in scientific literature shall be used.
When the LC50 value is unknown, the toxicity index is determined by using the lowest LC50 value of substances of similar physiological and chemical effects, or through testing if this is the only practical possibility.

Corrosive gases

Gases or gas mixtures meeting the criteria for toxicity completely owing to their corrosivity are to be classified as toxic with a subsidiary corrosivity hazard.

A gas mixture that is considered to be toxic due to the combined effects of corrosivity and toxicity has a subsidiary hazard of corrosivity when the mixture is known by human experience to be destructive to the skin, eyes or mucous membranes or when the LC50 value of the corrosive components of the mixture is equal to or less than 5 000 ml/m3 (ppm) when the LC50 is calculated by the formula:

 
LC50  Corrosive (mixture) =

where    fci    =    mole fraction of the ith corrosive component substance of the mixture; Tci    =    toxicity index of the ith corrosive component substance of the mixture.
The Tci equals the LC50 value as found in packing instruction P200 of 4.1.4.1.

When no LC50 value is listed in packing instruction P200 of 4.1.4.1, a LC50 value available in scientific literature shall be used.
When the LC50 value is unknown the toxicity index is determined by  using the lowest LC50 value of substances of similar physiological and chemical effects, or through testing if this is the only practical possibility.
 

Aerosols

Aerosols (UN No. 1950) are assigned to one of the following groups according to their hazardous properties, as follows:

A    asphyxiant;

O    oxidizing;

F    flammable;

T    toxic;

C    corrosive;

CO    corrosive, oxidizing;

FC    flammable, corrosive;

TF    toxic, flammable;

TC    toxic, corrosive;

TO    toxic, oxidizing;

TFC    toxic, flammable, corrosive; TOC    toxic, oxidizing, corrosive.
The classification depends on the nature of the contents of the aerosol dispenser.

NOTE: Gases, which meet the definition of toxic gases according to 2.2.2.1.5 and gases identified as "Considered as pyrophoric" by table note c of Table 2 of packing instruction P200 in 4.1.4.1, shall  not be used as a propellant in an aerosol dispenser. Aerosols with contents meeting the criteria for packing group I for toxicity or corrosivity shall not be accepted for carriage (see also 2.2.2.2.2).

The following criteria shall apply:

(a)    Assignment to group A shall apply when the contents do not meet the criteria for any other group according to sub-paragraphs (b) to (f) below;

(b)    Assignment to group O shall apply when the aerosol contains an oxidizing gas according to 2.2.2.1.5;

(c)    Assignment to group F shall apply if the contents include 85% by mass or more flammable components and the chemical heat of combustion is 30 kJ/g or more.

It shall not apply if the contents contain 1% by mass or less flammable components and the heat of combustion is less than 20 kJ/g.

Otherwise the aerosol shall be tested for flammability in accordance with the tests described in the Manual of Tests and Criteria, Part III, section 31. Extremely flammable and flammable aerosols shall be assigned to group F;

NOTE: Flammable components are flammable  liquids,  flammable  solids  or  flammable gases and gas mixtures as defined in Notes 1 to 3 of sub-section 31.1.3 of Part III of the Manual of Tests and Criteria. This designation does not cover pyrophoric, self-heating or water-reactive substances. The chemical heat of combustion shall be determined by one of the following methods ASTM D 240, ISO/FDIS 13943:1999 (E/F) 86.1 to 86.3 or NFPA 30B.

(d)    Assignment to group T shall apply when the contents, other than the propellant of aerosol dispensers to be ejected, are classified as Class 6.1, packing groups II or III;

(e)    Assignment to group C shall apply when the contents, other than the propellant of aerosol dispensers to be ejected, meet the criteria for Class 8, packing groups II or III;

(f)    When the criteria for more than one group amongst groups O, F, T, and C are met, assignment to groups CO, FC, TF, TC TO, TFC or TOC shall apply, as relevant.
 

Chemicals under pressure

Chemicals under pressure (UN Nos. 3500 to 3505) are assigned to one of the following groups according to their hazardous properties, as follows:

A    asphyxiant;

F    flammable;

T    toxic;

C    corrosive;

FC    flammable, corrosive; TF    toxic, flammable.
The classification depends on the hazard characteristics of the components in the different states:

The propellant; The liquid; or The solid.
NOTE 1: Gases, which meet the definition of toxic gases or of oxidizing gases according to 2.2.2.1.5 or gases identified as "Considered as pyrophoric" by table note c of Table 2 of packing instruction P200 in 4.1.4.1, shall not be used as a propellant in chemicals under pressure.

NOTE 2: Chemicals under pressure with contents meeting the criteria for packing group I for toxicity or corrosivity or with contents meeting both the criteria for packing group II or III for toxicity and for packing group II or III for corrosivity shall not be accepted for carriage under these UN numbers.

NOTE 3: Chemicals under pressure with components meeting the properties of Class 1; liquid desensitized explosives of Class 3; self-reactive substances and solid desensitized explosives of Class 4.1; Class 4.2; Class 4.3; Class 5.1; Class 5.2; Class 6.2; or Class 7, shall not be used for carriage under these UN numbers.

NOTE 4: A chemical under pressure in an aerosol dispenser shall be carried under UN No. 1950.

The following criteria shall apply:

(a)    Assignment to group A shall apply when the contents do not meet the criteria for any other group according to sub-paragraphs (b) to (e) below;

(b)    Assignment to group F shall apply if one of the components, which can be a pure substance or  a mixture, needs to be classified as flammable. Flammable components are flammable liquids and liquid mixtures, flammable solids and solid mixtures or flammable gases and gas mixtures meeting the following criteria:

(i)    A flammable liquid is a liquid having a flashpoint of not more than 93 °C;

(ii)    A flammable solid is a solid which meets the criteria in 2.2.41.1;

(iii)    A flammable gas is a gas which meets the criteria in 2.2.2.1.5;

(c)    Assignment to group T shall apply when the contents, other than the propellant, are classified as dangerous goods of Class 6.1, packing groups II or III;

(d)    Assignment to group C shall apply when the contents, other than the propellant, are classified as dangerous goods of Class 8, packing groups II or III;

(e)    When the criteria for two groups amongst groups F, T, and C are met, assignment to groups FC or TF shall apply, as relevant.
 

Gases not accepted for carriage

Chemically unstable gases of Class 2 shall not be accepted for carriage unless the necessary precautions have been taken to prevent the possibility of a dangerous decomposition  or polymerization under normal conditions of carriage or unless carried in accordance with special packing provision (r) of packing instruction P200 (10) of 4.1.4.1, as applicable. For the precautions necessary to prevent polymerization, see special provision 386 of Chapter 3.3. To this end particular care shall be taken to ensure that receptacles and tanks do not contain any substances liable to  promote these reactions.

The following substances and mixtures shall not be accepted for carriage:

-    UN No. 2186 HYDROGEN CHLORIDE, REFRIGERATED LIQUID;

-    UN No. 2421 NITROGEN TRIOXIDE;

-    UN No. 2455 METHYL NITRITE;

-    Refrigerated liquefied gases which cannot be assigned to classification codes 3A, 3O or 3F;

-    Dissolved gases which cannot be classified under UN Nos. 1001, 2073 or 3318;

-    Aerosols where gases which are toxic according to 2.2.2.1.5 or pyrophoric according  to packing instruction P200 in 4.1.4.1 are used as propellants;

-    Aerosols with contents meeting the criteria for packing group I for toxicity or corrosivity   (see
2.2.61 and 2.2.8);

-    Receptacles, small, containing gases which are very toxic (LC50 lower than 200 ppm) or pyrophoric according to packing instruction P200 in 4.1.4.1.
 

List of collective entries

Compressed gases

Classification code

UN        Name of the substance or article No.

1A

1956       COMPRESSED GAS, N.O.S.

1O

3156       COMPRESSED GAS, OXIDIZING, N.O.S.

1F

1964       HYDROCARBON GAS MIXTURE, COMPRESSED, N.O.S.

1954       COMPRESSED GAS, FLAMMABLE, N.O.S.

1T

1955       COMPRESSED GAS, TOXIC, N.O.S.

1TF

1953       COMPRESSED GAS, TOXIC, FLAMMABLE, N.O.S.

1TC

3304       COMPRESSED GAS, TOXIC, CORROSIVE, N.O.S.

1TO

3303       COMPRESSED GAS, TOXIC, OXIDIZING, N.O.S.

1TFC

3305       COMPRESSED GAS, TOXIC, FLAMMABLE, CORROSIVE, N.O.S.

1TOC

3306       COMPRESSED GAS, TOXIC, OXIDIZING, CORROSIVE, N.O.S.

 

 

Liquefied gases

Classification code

UN

No.

Name of the substance or article

2A

1058

LIQUEFIED GASES, non-flammable, charged with nitrogen, carbon dioxide or air

 

1078

REFRIGERANT GAS, N.O.S.

 

 

such as mixtures of gases, indicated by the letter R..., which as:

 

 

Mixture F1, have a vapour pressure at 70 °C not exceeding 1.3 MPa (13 bar) and a

 

 

density at 50 °C not lower than that of dichlorofluoromethane (1.30 kg/l);

 

 

Mixture F2, have a vapour pressure at 70 °C not exceeding 1.9 MPa (19 bar) and a

 

 

density at 50 °C not lower than that of dichlorodifluoromethane (1.21 kg/l);

 

 

Mixture F3, have a vapour pressure at 70 °C not exceeding 3 MPa (30 bar) and a density

 

 

at 50 °C not lower than that of chlorodifluoromethane (1.09 kg/l).

 

 

NOTE: Trichlorofluoromethane (Refrigerant R 11), 1,1,2-trichloro-1,2,2-

 

 

trifluoroethane (Refrigerant R 113), 1,1,1-trichloro-2,2,2-trifluoroethane (Refrigerant R

 

 

113a), 1-chloro-1,2,2-trifluoroethane (Refrigerant R 133) and 1-chloro-1,1,2-

 

 

trifluoroethane (Refrigerant R 133b) are not substances of Class 2. They may, however,

 

 

enter into the composition of mixtures F1 to F3.

 

1968

INSECTICIDE GAS, N.O.S.

 

3163

LIQUEFIED GAS, N.O.S.

2O

3157

LIQUEFIED GAS, OXIDIZING, N.O.S.

2F

1010

BUTADIENES AND HYDROCARBON MIXTURE, STABILIZED, having a vapour

 

 

pressure at 70 °C not exceeding 1.1 MPa (11 bar) and a density at 50 °C not lower than

 

 

0.525 kg/l.

 

 

NOTE: Butadienes, stabilized are also classified under UN No. 1010, see Table A of

 

 

Chapter 3.2.

 

1060

METHYLACETYLENE AND PROPADIENE MIXTURE, STABILIZED

 

 

such as mixtures of methylacetylene and propadiene with hydrocarbons, which as:

 

 

Mixture P1, contain not more than 63% methylacetylene and propadiene by volume and

 

 

not more than 24% propane and propylene by volume, the percentage of C4- saturated

 

 

hydrocarbons being not less than 14% by volume; and as

 

 

Mixture P2, contain not more than 48% methylacetylene and propadiene by volume and

 

 

not more than 50% propane and propylene by volume, the percentage of C4- saturated

 

 

hydrocarbons being not less than 5% by volume,

 

 

as well as mixtures of propadiene with 1 to 4% methylacetylene.

 

Liquefied gases (cont'd)

Classification code

UN

No.

Name of the substance or article

2F

1965

HYDROCARBON GAS MIXTURE, LIQUEFIED, N.O.S

(cont'd)

 

such as mixtures, which as:

 

 

Mixture A, have a vapour pressure at 70 °C not exceeding 1.1 MPa (11 bar) and a

 

 

density at 50 °C not lower than 0.525 kg/l;

 

 

Mixture A01, have a vapour pressure at 70 °C not exceeding 1.6 MPa (16 bar) and a

 

 

relative density at 50 °C not lower than 0.516 kg/l;

 

 

Mixture A02, have a vapour pressure at 70 °C not exceeding 1.6 MPa (16 bar) and a

 

 

relative density at 50 °C not lower than 0.505 kg/l;

 

 

Mixture A0, have a vapour pressure at 70 °C not exceeding 1.6 MPa (16 bar) and a

 

 

density at 50 °C not lower than 0.495 kg/l;

 

 

Mixture A1, have a vapour pressure at 70 °C not exceeding 2.1 MPa (21 bar) and a

 

 

density at 50 °C not lower than 0.485 kg/l;

 

 

Mixture B1 have a vapour pressure at 70 °C not exceeding 2.6 MPa (26 bar) and a

 

 

relative density at 50 °C not lower than 0.474 kg/l;

 

 

Mixture B2 have a vapour pressure at 70 °C not exceeding 2.6 MPa (26 bar) and a

 

 

relative density at 50 °C not lower than 0.463 kg/l;

 

 

Mixture  B,  have  a  vapour pressure  at  70 °C not  exceeding 2.6  MPa (26 bar) and    a

 

 

density at 50 °C not lower than 0.450 kg/l;

 

 

Mixture  C,  have  a  vapour  pressure  at  70 °C not  exceeding 3.1  MPa (31 bar) and   a

 

 

relative density at 50 °C not lower than 0.440 kg/l;

 

 

NOTE  1:  In  the  case  of  the  foregoing  mixtures,  the  use  of  the  following    names

 

 

customary in the trade is permitted for describing these substances: for mixtures A, A01,

 

 

A02 and A0: BUTANE; for mixture C: PROPANE.

 

 

NOTE  2:  UN  No.  1075  PETROLEUM  GASES,  LIQUEFIED  may  be  used  as    an

 

 

alternative  entry  for  UN  No.  1965  HYDROCARBON  GAS  MIXTURE LIQUEFIED,

 

 

N.O.S. for carriage prior to or following maritime or air carriage.

 

3354

INSECTICIDE GAS, FLAMMABLE, N.O.S.

 

3161

LIQUEFIED GAS, FLAMMABLE, N.O.S.

2T

1967

INSECTICIDE GAS, TOXIC, N.O.S.

 

3162

LIQUEFIED GAS, TOXIC, N.O.S.

2TF

3355

INSECTICIDE GAS, TOXIC, FLAMMABLE, N.O.S.

 

3160

LIQUEFIED GAS, TOXIC, FLAMMABLE, N.O.S.

2TC

3308

LIQUEFIED GAS, TOXIC, CORROSIVE, N.O.S.

2TO

3307

LIQUEFIED GAS, TOXIC, OXIDIZING, N.O.S.

2TFC

3309

LIQUEFIED GAS, TOXIC, FLAMMABLE, CORROSIVE, N.O.S.

2TOC

3310

LIQUEFIED GAS, TOXIC, OXIDIZING, CORROSIVE, N.O.S.

 

Refrigerated liquefied gases

Classification code

UN

No.

Name of the substance or article

3A

3158

GAS, REFRIGERATED LIQUID, N.O.S.

3O

3311

GAS, REFRIGERATED LIQUID, OXIDIZING, N.O.S.

3F

3312

GAS, REFRIGERATED LIQUID, FLAMMABLE, N.O.S.

 

Dissolved gases

Classification code

UN        Name of the substance or article No.

4

Only substances listed in Table A of Chapter 3.2 are to be accepted for carriage.

 

Aerosols and receptacles, small, containing gas

Classification code

UN        Name of the substance or article No.

5

1950       AEROSOLS

2037       RECEPTACLES, SMALL CONTAINING GAS (GAS CARTRIDGES) without a

release device, non-refillable

 

Other articles containing gas under pressure

Classification code

UN

No.

 

Name of the substance or article

6A

2857

REFRIGERATING MACHINES containing non-flammable, non-toxic gases or ammonia solutions (UN 2672)

ARTICLES, PRESSURIZED, PNEUMATIC (containing non-flammable gas) or ARTICLES, PRESSURIZED, HYDRAULIC (containing non-flammable gas) ARTICLES CONTAINING NON-FLAMMABLE, NON TOXIC GAS, N.O.S.

 

3164

 

3164

 

3538

6F

3150

DEVICES, SMALL, HYDROCARBON GAS POWERED or

 

3150

HYDROCARBON GAS REFILLS FOR SMALL DEVICES, with release device

 

3478

FUEL CELL CARTRIDGES, containing liquefied flammable gas or

 

3478

FUEL CELL CARTRIDGES CONTAINED IN EQUIPMENT, containing liquefied

 

 

flammable gas or

 

3478

FUEL CELL CARTRIDGES PACKED WITH EQUIPMENT, containing liquefied

 

 

flammable gas

 

3479

FUEL CELL CARTRIDGES, containing hydrogen in metal hydride or

 

3479

FUEL CELL CARTRIDGES CONTAINED IN EQUIPMENT, containing hydrogen in

 

 

metal hydride or

 

3479

FUEL CELL CARTRIDGES PACKED WITH EQUIPMENT, containing hydrogen in

 

 

metal hydride

 

3529

ENGINE, INTERNAL COMBUSTION, FLAMMABLE GAS POWERED or

 

3529

ENGINE, FUEL CELL, FLAMMABLE GAS POWERED or

 

3529

MACHINERY, INTERNAL COMBUSTION, FLAMMABLE GAS POWERED or

 

3529

MACHINERY, FUEL CELL, FLAMMABLE GAS POWERED

 

3537

ARTICLES CONTAINING FLAMMABLE GAS, N.O.S.

6T

3539

ARTICLES CONTAINING TOXIC GAS, N.O.S.

 

Gas samples

Classification code

UN

No.

 

Name of the substance or article

7F

3167

GAS SAMPLE, NON-PRESSURIZED, FLAMMABLE, N.O.S., not refrigerated liquid

7T

3169

GAS SAMPLE, NON-PRESSURIZED, TOXIC, N.O.S., not refrigerated liquid

7TF

3168

GAS SAMPLE, NON-PRESSURIZED, TOXIC, FLAMMABLE, N.O.S., not

refrigerated liquid

 

Chemicals under pressure

Classification code

UN        Name of the substance or article No.

8A

3500       CHEMICAL UNDER PRESSURE, N.O.S.

8F

3501       CHEMICAL UNDER PRESSURE, FLAMMABLE, N.O.S.

8T

3502       CHEMICAL UNDER PRESSURE, TOXIC, N.O.S.

8C

3503       CHEMICAL UNDER PRESSURE, CORROSIVE, N.O.S.

8TF

3504       CHEMICAL UNDER PRESSURE, FLAMMABLE, TOXIC, N.O.S.

8FC

3505       CHEMICAL UNDER PRESSURE, FLAMMABLE, CORROSIVE, N.O.S.

 

Adsorbed gases

Classification code

UN        Name of the substance or article No.

9A

3511       ADSORBED GAS, N.O.S.

9O

3513       ADSORBED GAS, OXIDIZING, N.O.S.

9F

3510       ADSORBED GAS, FLAMMABLE, N.O.S.

9T

3512       ADSORBED GAS, TOXIC, N.O.S.

9TF

3514       ADSORBED GAS, TOXIC, FLAMMABLE, N.O.S.

9TC

3516       ADSORBED GAS, TOXIC, CORROSIVE, N.O.S.

9TO

3515       ADSORBED GAS, TOXIC, OXIDIZING, N.O.S.

9TFC

3517       ADSORBED GAS, TOXIC, FLAMMABLE, CORROSIVE, N.O.S.

9TOC

3518       ADSORBED GAS, TOXIC, OXIDIZING, CORROSIVE, N.O.S.

Class 3 Flammable liquids

Criteria

The heading of Class 3 covers substances and articles containing substances of this Class which:

-    are liquids according to subparagraph (a) of the definition for "liquid" in 1.2.1;

-    have at 50 °C a vapour pressure of not more than 300 kPa (3 bar) and are not completely gaseous at 20 °C and at standard pressure of 101.3 kPa; and

-    have a flash-point of not more than 60 °C (see 2.3.3.1 for the relevant test).

The heading of Class 3 also covers liquid substances and molten solid substances with a flash-point of more than 60°C and which are carried or handed over for carriage whilst heated at temperatures equal to or higher than their flash-point. These substances are assigned to UN No. 3256.

The heading of Class 3 also covers liquid desensitized explosives. Liquid desensitized explosives are explosive substances which are dissolved or suspended in water or other liquid substances, to form an homogeneous liquid mixture to suppress their explosive properties. Such entries in Table  A  of Chapter 3.2 are UN Nos. 1204, 2059, 3064, 3343, 3357 and 3379.

NOTE 1: Substances having a flash-point above 35 °C, which do not sustain combustion according to the criteria of sub-section 32.2.5 of Part III of the Manual of Tests and Criteria, are not substances of Class 3; if, however, these substances are handed over for carriage and carried whilst heated at temperatures equal to or higher than their flash-point, they are substances of Class 3.

NOTE 2: By derogation from paragraph 2.2.3.1.1 above, diesel fuel, gasoil, heating oil (light) including synthetically manufactured products having a flash-point above 60 °C and not more than 100 °C shall be deemed substances of Class 3, UN No. 1202.
NOTE 3: Flammable liquids which are highly toxic by inhalation, as defined in 2.2.61.1.4 to 2.2.61.1.9, and toxic substances having a flash-point of 23 °C or above are substances of Class 6.1 (see 2.2.61.1). Liquids which are highly toxic by inhalation are indicated as “toxic by inhalation” in their proper shipping name in Column (2) or by special provision 354 in Column (6) of Table A of Chapter 3.2.

NOTE 4: Flammable liquid substances and preparations used as pesticides, which are highly toxic, toxic or slightly toxic and have a flash-point of 23 °C or above are substances of Class 6.1 (see 2.2.61.1).
 

The substances and articles of Class 3 are subdivided as follows:
F    Flammable liquids, without subsidiary hazard and articles containing such substances: F1    Flammable liquids having a flash-point of or below 60 °C;

F2    Flammable liquids having a flash-point above 60 °C which are carried or    handed over for carriage at or above their flash-point (elevated temperature substances);

F3    Articles containing flammable liquids;

FT    Flammable liquids, toxic:

FT1    Flammable liquids, toxic;

FT2    Pesticides;

FC      Flammable liquids, corrosive;

FTC  Flammable liquids, toxic, corrosive;

D    Liquid desensitized explosives.
 

Substances and articles classified in Class 3 are listed in Table A of Chapter 3.2. Substances not mentioned by name in Table A of Chapter 3.2 shall be assigned to the relevant entry of 2.2.3.3 and the relevant packing group in accordance with the provisions of this section. Flammable liquids shall be assigned to one of the following packing groups according to the degree of danger they present for carriage:

 

Packing group

Flash point (closed cup)

Initial boiling point

I

--

£ 35°C

II a

< 23°C

> 35°C

III a

³ 23°C £ 60°C

> 35°C

a                 See also 2.2.3.1.4.

 

For a liquid with (a) subsidiary hazard(s), the packing group determined in accordance with the table above and the packing group based on the severity of the subsidiary hazard(s) shall be considered; the classification and packing group shall then be determined in accordance with the table of precedence of hazards in 2.1.3.10.

  1. Viscous flammable liquids such as paints, enamels, lacquers, varnishes, adhesives and polishes having a flash-point of less than 23 °C may be assigned to packing group III in conformity with the procedures prescribed in the Manual of Tests and Criteria, Part III, sub-section 32.3, provided that:
  2.  
  3. a. the viscosity2 and flash-point are in accordance with the following table:

 

Kinematic viscosity (extrapolated)

n (at near-zero shear rate) mm2/s at 23°C

 

Flow-time t in seconds

 

Jet diameter (mm)

 

Flash-point, closed-cup (°C)

20 < n £ 80

20 < t £ 60

4

above 17

80 < n £ 135

60 < t £ 100

4

above 10

135 < n  £ 220

20 < t £ 32

6

above 5

220 < n  £ 300

32 < t £ 44

6

above -1

300 < n  £ 700

44 < t £ 100

6

above -5

700 < n

100 < t

6

no limit

 

    1. b. Less than 3% of the clear solvent layer separates in the solvent separation test;
    2. c. The mixture or any separated solvent does not meet the criteria for Class 6.1 or Class 8;
    1. d. The substances are packed in receptacles of not more than 450 litre capacity.

 

NOTE: These provisions also apply to mixtures containing no more than 20% nitrocellulose with a nitrogen content not exceeding 12.6% by dry mass. Mixtures containing more than 20% but not more than 55% nitrocellulose with a nitrogen content not exceeding 12.6% by dry mass are substances assigned to UN No. 2059.

 

Mixtures having a flash-point below 23 °C and containing:

 

  • more than 55% nitrocellulose, whatever their nitrogen content; or

 

  • not more than 55% nitrocellulose with a nitrogen content above 12.6% by dry mass,

 

are substances of Class 1 (UN Nos. 0340 or 0342) or of Class 4.1 (UN Nos. 2555, 2556 or2557).

 

_____________________

2          Viscosity determination: Where the substance concerned  is  non-Newtonian,  or  where  a  flow  cup  method  of viscosity determination is otherwise unsuitable, a variable shear-rate viscometer shall be used to  determine  the dynamic viscosity coefficient of the substance, at 23 °C, at a number of shear rates. The values obtained are plotted against shear rate and then extrapolated to zero shear rate. The dynamic viscosity thus obtained, divided by the density, gives the apparent kinematic viscosity at near-zero shear rate.

Viscous liquids

Except as provided for in 2.2.3.1.5.2, viscous liquids which:

-    have a flash-point of 23 °C or above and less than or equal to 60 °C;

-    are not toxic, corrosive or environmentally hazardous;

-    contain not more than 20% nitrocellulose  provided  the  nitrocellulose  contains  not  more  than 12.6% nitrogen by dry mass; and

-    are packed in receptacles of not more than 450 litre capacity; are not subject to ADR, if:
(a)    in the solvent separation test (see Manual of Tests and Criteria, Part III, sub-section 32.5.1), the height of the separated layer of solvent is less than 3% of the total height; and

(b)    the flowtime in  the  viscosity  test  (see  Manual  of  Tests  and  Criteria,  Part  III, sub-  section 32.4.3), with a jet diameter of 6 mm is equal to or greater than:

(i)    60 seconds; or
(ii)    40 seconds if the viscous liquid contains not more than 60% of Class 3 substances. 

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