Part IIIViscous Substances not required to be Classified as Flammable Liquids
For the purposes of Part I, a substance shall not be classified as a flammable liquid if it complies with the following conditions, namely—
(a)the substance does not have the hazardous properties of a toxic or corrosive substance;
(b)the substance is a solution or homogeneous mixture which does not contain more than 20% nitro-cellulose containing not more than 12.6% nitrogen by mass;
(c)the flash point of the substance is equal to or greater than 23°C;
(d)in a suitable solvent separation test, the solvent which separates is not more than 3% of the volume of the substance; and
(e)the viscosity of the substance when determined at 23°C in a flow cup conforming to the International Standards Organisation Standard ISO 2431-1984 or British Standard BS EN 535-1991 and having a jet diameter of 6 mm is—
(i)in a case where the substance contains not more than 60% of a flammable liquid with a flash point of 61°C or less, not less than 40 seconds;
(ii)in any other case, not less than 60 seconds.