Regulation of Dangerous Goods

SN No.

63

The division of Class 2 and the subsidiary hazards depend on the nature of the contents of the aerosol.  The following provisions apply:

(a) Class 2.1 applies if the contents include 85% by mass or more flammable components and the chemical heat of combustion is 30 kJ/g or more;

(b) Class 2.2 applies if the contents contain 1% by mass or less flammable components and the heat of combustion is less than 20 kJ/g;

(c) Otherwise the product shall be classified as tested by the tests described in the Manual of Tests and Criteria, Part III, section 31.  Extremely flammable and flammable aerosols shall be classified in Class 2.1; non-flammable in Class 2.2;

(d) Gases of Class 2.3 shall not be used as a propellant in an aerosol;

(e) Where the contents other than the propellant of aerosol to be ejected are classified as Class 6.1 packing groups II or III or Class 8 packing groups II or III, the aerosol shall have a subsidiary hazard of Class 6.1 or Class 8;

(f) Contents of the aerosols shall not meet the criteria for packing group I for toxicity or corrosivity.

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.

122

The subsidiary hazard(s), control and emergency temperatures if any, and the generic entry number for each of the currently assigned organic peroxide formulations are given in 2.2.5.4.

127

Other inert material or inert material mixture may be used, provided that this inert material has identical phlegmatising properties.

163

Materials stored and/or conveyed under this entry shall not contain more than 20% nitrocellulose provided the nitrocellulose contains not more than 12.6% nitrogen (by dry mass).

194

The control and emergency temperatures, if any, and the generic entry number for each of the currently assigned self-reactive substances are given in 2.2.4.5.

198

Nitrocellulose solutions containing not more than 20% nitrocellulose may be classified as paint, perfumery products or printing ink, as applicable.

205

This entry shall not be used for UN 3155 PENTACHLOROPHENOL.

215

This entry only applies to the technically pure substance or to formulations derived from it having a SADT higher than 75°C and therefore does not apply to formulations which are self-reactive substances.  (For self-reactive substances, see 2.2.4.5).

228

Mixtures not meeting the criteria for flammable gases (Class 2.1) shall be classified under UN 3163.

236

Polyester resin kits consist of two components: a base material (either Class 3 or Class 4.1, packing group II or III) and an activator (organic peroxide).  The organic peroxide shall be type D, E, or F, not requiring temperature control.  The packing group shall be II or III, according to the criteria of either Class 3 or Class 4.1, as appropriate, applied to the base material.  The quantity limits for limited quantity and maximum package size specified in the DG List apply to the base material.

247

Pursuant to section 140 of Cap. 295G, the packing, marking and labelling requirements do not apply to UN 3065.

270

Aqueous solutions of Class 5.1 inorganic solid nitrate substances are considered as not meeting the criteria of Class 5.1 if the concentration of the substances in solution at the minimum temperature is not greater than 80% of the saturation limit.

273

Maneb and maneb preparations stabilised against self-heating need not be classified in Class 4.2 when it can be demonstrated by testing that a cubic volume of 1 m³ of substance does not self-ignite and that the temperature at the centre of the sample does not exceed 200°C, when the sample is maintained at a temperature of not less than 75°C ± 2°C for a period of 24 hours.

274

The proper shipping name can be supplemented with the technical name.

279

The substance is assigned to this classification or packing group based on human experience rather than the strict application of classification criteria set out in the Code.

315

This entry shall not be used for Class 6.1 substances which meet the inhalation toxicity criteria for packing group I.

322

When stored and/or conveyed in non-friable tablet form, these goods are assigned to packing group III.

324

This substance needs to be stabilised when in concentrations of not more than 99%.

343

This entry applies to crude oil containing hydrogen sulphide in sufficient concentration that vapours evolved from the crude oil can present an inhalation hazard.  The packing group assigned shall be determined by the flammability hazard and inhalation hazard, in accordance with the degree of danger presented.

354

This substance is toxic by inhalation.

357

Petroleum crude oil containing hydrogen sulphide in sufficient concentration that vapours evolved from the crude oil can present an inhalation hazard shall be classified under the entry UN 3494 PETROLEUM SOUR CRUDE OIL, FLAMMABLE, TOXIC.

359

Nitroglycerin solution in alcohol with more than 1% but not more than 5% nitroglycerin shall be classified in Class 1 and assigned to UN 0144 if not all the requirements of basic packing instruction BP300 are complied with.

362

This entry applies to liquids, pastes or powders, pressurised with a propellant which meets the definition of a gas in 2.2.2.1.1 and 2.2.2.1.2 (a) or (b).

NOTE: A chemical under pressure in an aerosol shall be classified under UN 1950.

The following provisions apply:

(a)       The chemical under pressure shall be classified based on the hazard characteristics of the components in the different states:

•           The propellant;

•           The liquid; or

•           The solid.

If one of these components, which can be a pure substance or a mixture, needs to be classified as flammable, the chemical under pressure shall be classified as flammable in Class 2.1.  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 2.2.4.1.4 of the Code;

(iii) A flammable gas is a gas which meets the criteria in 2.2.2.2.1 of the Code;

(b) Gases of Class 2.3 and gases with a subsidiary hazard of Class 5.1 shall not be used as a propellant in a chemical under pressure;

(c) Where the liquid or solid components are classified as DG of Class 6.1, packing groups II or III, or Class 8, packing groups II or III, the chemical under pressure shall be assigned a subsidiary hazard of Class 6.1 or Class 8 and the appropriate UN number shall be assigned.  Components classified in Class 6.1, packing group I, or Class 8, packing group I, shall not be classified under this UN number;

(d) In addition, chemicals under pressure with components meeting the properties of: Class 3, liquid desensitised explosives; Class 4.1, self-reactive substances and solid desensitised explosives; Class 4.2, substances liable to spontaneous combustion; Class 4.3, substances which, in contact with water, emit flammable gases; Class 5.1 oxidising substances or Class 5.2, organic peroxides, shall not be classified under this UN number;

(e) Substances to which PP86 is assigned in respective packing provisions and therefore require air to be eliminated from the vapour space, shall not be classified under this UN number but shall be classified under their respective UN numbers as listed in the DG List.

382

Polymeric beads may be made from polystyrene, poly (methyl methacrylate) or other polymeric material.  When it can be demonstrated that no flammable vapour, resulting in a flammable atmosphere, is evolved according to test U1 (Test method for substances liable to evolve flammable vapours) of Part III, sub-section 38.4.4 of the Manual of Tests and Criteria, POLYMERIC BEADS, EXPANDABLE need not be classified under this UN number.  This test should only be performed when de-classification of a substance is considered.