2.7. Flammable solids
2.7. Flammable solids
2.7.1.1. A flammable solid means a solid which is readily combustible, or may cause or contribute to fire through friction.
2.7.1.1. A flammable solid means a solid which is readily combustible, or may cause or contribute to fire through friction.
Readily combustible solids are powdered, granular, or pasty substances or mixtures which are dangerous if they can be easily ignited by brief contact with an ignition source, such as a burning match, and if the flame spreads rapidly.
2.7.2. Classification criteria
2.7.2.1. Powdered, granular or pasty substances or mixtures (except powders of metals or metal alloys — see 2.7.2.2) shall be classified as readily combustible solids when the time of burning of one or more of the test runs, performed in accordance with the test method described in Part III, sub-section 33.2.1, of the
►M4
UN RTDG ◄ , Manual of Tests and Criteria, is less than 45 seconds or the rate of burning is more than 2,2 mm/s.
2.7.2.1. Powdered, granular or pasty substances or mixtures (except powders of metals or metal alloys — see 2.7.2.2) shall be classified as readily combustible solids when the time of burning of one or more of the test runs, performed in accordance with the test method described in Part III, sub-section 33.2.1, of the ►M4 UN RTDG ◄ , Manual of Tests and Criteria, is less than 45 seconds or the rate of burning is more than 2,2 mm/s.
2.7.2.2. Powders of metals or metal alloys shall be classified as flammable solids when they can be ignited and the reaction spreads over the whole length of the sample (100 mm) in 10 min or less.
2.7.2.3. A flammable solid shall be classified in one of the two categories for this class using Method N.1 as described in 33.2.1 of the ►M4 UN RTDG ◄ , Manual of Tests and Criteria in accordance with Table 2.7.1:
Table 2.7.1
Criteria for flammable solids
|
Category |
Criteria |
|
1 |
Burning rate test Substances and mixtures other than metal powders: (a) wetted zone does not stop fire and (b) burning time < 45 seconds or burning rate > 2,2 mm/s Metal powders burning time ≤ 5 minutes |
|
2 |
Burning rate test Substances and mixtures other than metal powders: (a) wetted zone stops the fire for at least 4 minutes and (b) burning time < 45 seconds or burning rate > 2,2 mm/s Metal powders burning time > 5 minutes and ≤ 10 minutes |
Note 1:
The test shall be performed on the substance or mixture in its physical form as presented. If, for example, for the purposes of supply or transport, the same chemical is to be presented in a physical form different from that which was tested and which is considered likely to materially alter its performance in a classification test, the substance shall also be tested in the new form.
Note 2:
Aerosols shall not be classified as flammable solids; see section 2.3.
2.7.3. Hazard Communication
Label elements shall be used for substances or mixtures meeting the criteria for classification in this hazard class in accordance with Table 2.7.2.
Table 2.7.2
Label elements for flammable solids
|
Classification |
Category 1 |
Category 2 |
|
GHS Pictograms |
|
|
|
Signal Word |
Danger |
Warning |
|
Hazard Statement |
H228: Flammable Solid |
H228: Flammable Solid |
|
Precautionary Statement Prevention |
P210 P240 P241 P280 |
P210 P240 P241 P280 |
|
Precautionary Statement Response |
P370 + P378 |
P370 + P378 |
|
Precautionary Statement Storage |
|
|
|
Precautionary Statement Disposal |
|
|
