2.2.3.1.4

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:

(a) the viscosity2 and flash-point are in accordance with the following table:

kinematic viscosity (extrapolated)  (at near-zero shear rate) mm2/s at 23°c	flow-time t in seconds	jet diameter (mm)	flash-point, closed-cup (°c)
20 <   80	20 < t  60	4	above 17
80 <   135	60 < t  100	4	above 10
135 <   220	20 < t  32	6	above 5
220 <   300	32 < t  44	6	above -1
300 <   700	44 < t  100	6	above -5
700 < 	100 < t	6	no limit

(b) less than 3% of the clear solvent layer separates in the solvent separation test;

(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.