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Physical & Chemical properties

Flammability

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Description of key information

Non flammable solid (European Commission Regulation (EC) No. 440/2008, Method A.10.) (Read across from structural homologue "[938-147-6] Fatty acid chlorides, C8-14 (even numbered), reaction products with glycine").
No pyrophoricity.
No flammability on contact with water.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

The test item is not a highly flammable solid in the sense of the European Commission Regulation (EC) No. 440/2008, Method A.10.

(Read across from structural homologue "[938-147-6] Fatty acid chlorides, C8-14 (even numbered), reaction products with glycine").

The composition of the source material [938-147-6] Fatty acid chlorides, C8-14 (even numbered), reaction products with glycine only slightly deviates from the target material with regard to the C-chain distribution:

C-chain distribution of N-Alkanoyl glycin sodium constituents of the UVCB substances (normalised to 100%), melting ranges, boiling and physical state:

  Source material (Glycine, N-coco acyl derivs., sodium salts) Target Material
 C8  4 -12 %  3 -14%
 C10  5 -12 %  4 -10%
 C12  55 -68 %  75 - 90%
 C14  14 -24%  -
 C16  < 8%  -
 melting range  141 -190°C  143 -174°C
 boiling behaviour  decomposition before boiling at 260°C  decomposition before boiling at 290°C
 phys. state  white crystalline solid  white crystalline solid

Compared to the source material the content of the main C-homologue (C12) of the target material is increased, whereas longer C-chain lengths are not present in the target material. All other constituents are identical and are present at comparable concentrations. The melting ranges and boiling behaviour of both substances are comparable. Therefore, it is reasonable to conclude that the flammability properties of source and target materials are comparable.

Considering the structural formula and experience in handling and use it can be stated that pyrophoricity or flammability on contact with water are not a concern for the abovementioned substance. Therefore, testing for pyrophoricity or flammability on contact with water are scientifically unjustified.

Justification for classification or non-classification

According to REGULATION (EC) No 1272/2008 (CLP) powdered, granular or pasty substances or mixtures 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 UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, is less than 45 seconds or the rate of burning is more than 2,2 mm/s. In the test performed on the substance the test item could not be ignited by a flame.

A pyrophoric solid shall be classified in a single category for this class using test N.2 in Part III, subsection 33.3.1.4 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria if the solid ignites within 5 minutes of coming into contact with air.

A substance or mixture which, in contact with water, emits flammable gases shall be classified in one of the three categories for this class, using test N.5 in Part III, sub-section 33.4.1.4 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria.

Considering the structural formula and experience in handling and use it can be stated that pyrophoricity or flammability on contact with water are not a concern for the abovementioned substance.

Therefore, neither classification as flammable solid, nor as pyrophoric solid or substance which, in contact with water, emits flammable gases, are warranted.