Uranium hexafluoride shall only be assigned to:

(a)UN No. 2977, RADIOACTIVE MATERIAL, URANIUM HEXAFLUORIDE, FISSILE;

(b)UN No. 2978, RADIOACTIVE MATERIAL, URANIUM HEXAFLUORIDE, non-fissile orfissile-excepted; or

(c)UN No. 3507, URANIUM HEXAFLUORIDE, RADIOACTIVE MATERIAL, EXCEPTEDPACKAGE less than 0.1 kg per package, non-fissile or fissile-excepted.

The contents of a package containing uranium hexafluoride shall comply with the following requirements:

(a)For UN Nos. 2977 and 2978, the mass of uranium hexafluoride shall not be different from thatallowed for the package design, and for UN No. 3507, the mass of uranium hexafluoride shallbe less than 0.1 kg;

(b)The mass of uranium hexafluoride shall not be greater than a value that would lead to an ullagesmaller than 5% at the maximum temperature of the package as specified for the plant systemswhere the package shall be used; and

(c)The uranium hexafluoride shall be in solid form and the internal pressure shall not be aboveatmospheric pressure when presented for carriage.

Packages not otherwise classified in 2.2.7.2.4 (2.2.7.2.4.1 to 2.2.7.2.4.5) shall be classified in accordance with the competent authority certificateof approvalfor the package issued by the country of origin of design.

The contents of a Type B(U), Type B(M) or Type C package shall be as specified in the certificate of approval.

Corrosive substances are substances which, by chemical action, will cause irreversibledamage to the skin, or, in the case of leakage, will materially damage, or even destroy, other goods or the means of transport. The heading of this class also covers other substances which form a corrosive liquid only in the presence of water, or which produce corrosive vapour or mist in the presence of natural moisture of the air.

For substances and mixtures that are corrosive to skin, general classification provisions are provided in 2.2.8.1.4. Skin corrosion refers to the production of irreversible damage to the skin, namely, visible necrosis through the epidermis and into the dermis occurring after exposure to a substance or mixture.

Liquids and solids which may become liquid during carriage, which are judged not to be skin corrosiveshall still be considered for their potential to cause corrosion to certain metal surfaces in accordance with the criteria in 2.2.8.1.5.3 (c) (ii).

Substances and articles of Class8 are subdividedas follows:

C1-C11 Corrosive substances without subsidiary risk and articles containing such substances:

C1-C4 Acid substances:

C1Inorganic, liquid;
C2Inorganic, solid;
C3Organic, liquid;
C4Organic, solid;

C5-C8 Basic substances:

C5Inorganic, liquid;
C6Inorganic, solid;
C7Organic, liquid;
C8Organic, solid;

C9-C10Other corrosive substances:

C9Liquid;
C10Solid;

C11Articles;

CFCorrosive substances, flammable:

CF1Liquid;
CF2Solid;

CSCorrosive substances, self-heating:

CS1Liquid;
CS2Solid;

CWCorrosive substances which, in contact with water, emit flammable gases:

CW1Liquid;
CW2Solid;

COCorrosive substances, oxidizing:

CO1Liquid;
CO2Solid;

CTCorrosive substances, toxic and articles containing such substances:

CT1Liquid;
CT2Solid;
CT3Articles;

CFTCorrosive substances, flammable, liquid, toxic;

COTCorrosive substances, oxidizing, toxic.

Substances and mixtures of Class 8 are divided among the three packing groups according to their degree of danger in carriage:

(a)Packing group I: very dangerous substances and mixtures;

(b)Packing group II:substances and mixtures presenting medium danger;

(c)Packing group III:substances and mixtures that present minor danger.

Allocation of substances listed in Table A of Chapter 3.2 to the packing groups in Class 8 has been made on the basis of experience taking into account such additional factors as inhalation risk (see 2.2.8.1.4.5) and reactivity with water (including the formation of dangerous decomposition products).