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Physical & Chemical properties

Density

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Description of key information

Density: company data indicate specific gravity/relative density values in the range ca. 1.3 - 1.4 g/cm³ at ambient conditions for commercially-available aqueous solution.

Key value for chemical safety assessment

Additional information

No relative density values are available for the solid form of ATMP-H, but this does not constitute a data gap since no solid ATMP acid products are known. A number of specific gravity values of individual commercial products (aqueous solutions) are known. While the individual sources are secondary literature, meaning that in most cases the reliabilities are not assignable, overall the weight of evidence is taken to be adequately reliable for the purpose of registration, particularly in view of the acceptance of the data in the HPV program.

1) A relative density of 1.33 at 20°C was reported in a reliable reference source for ATMP-H. The same result is reported in a peer-reviewed data profile published through the OECD HPV program, which is considered reliable with restrictions. This is supported by the following company data of non-assignable reliability:

2) Values of 1.3 g/cm³ at 20 °C for four separate commercial forms of ATMP-H are listed in the online product specification data for a major European producer.

3) A specific gravity of 1320-1360 kg/m³ at 20 °C was reported in a company MSDS for ATMP-H for a major European producer. The original reference was not available for review and no further information is available.

4) A typical specific gravity of 1.33 ± 0.02 was reported in a company product data sheet for ATMP-H for a major European importer. The original reference was not available for review and no further information is available.

5) A specific gravity of 1.33 at 20°C was reported in a company MSDS for ATMP-H for a major European producer. The original reference was not available for review and no further information is available.