Calcium sulphidoacetate

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

no guideline required

Principles of method if other than guideline:

Auto flammability study

GLP compliance:

yes

In the investigation of self-ignition in the GREWER oven for the pure test item an endothermic effect could be observed at a temperature of 120°C followed by an exothermal process starting at 260°C and leading to a maximum temperature of appr. 460°C.

For the test item in mixture with Kieselguhr an endothermic effect could be observed at a temperature of 120°C an an exothermal process was determined at a temperature of 260°C leading to a maximum temperature of appr. 400°C.

Conclusions:

not flammable

Executive summary:

It is assumed due to the behaviour during auto flammability test, that the substance is not flammable

Reference 2

Endpoint:

flammable solids

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

supporting study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

GLP compliance:

yes (incl. QA statement)

Key result

Test procedure:

burning time (test type not further specified)

Remarks:

or specified in description of method (migrated information)

Remarks on result:

substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period

In a pretest a small amount of test material was put on a magnesia chute and heated with a Teclu burner. After a short time it started to burn. Without producing an own flame it stopped burning. The test material coaled and became black, expanding in volume.

 

For the main test the test material was loosely filled into a mould (250 mm long, triangular cross section of 10 mm height and 20 mm width). The mould was filled up two times after dropping on a solid surface.

The 250 mm long pile was inverted onto an inert plate. The pile was ignited at one end with the flame of a Teclu burner with at least 5 mm diameter.

 

No ignition of the test material was to observe. Therefore no burnig rate could be measured.

Interpretation of results:

non flammable

Remarks:

Migrated information

Conclusions:

The test material sodium mercaptoacetate should be considered as not highly flammable.

Description of key information

Not flammable due to auto flammability study of the same substance and flammability study of a similar substance sodium mercaptoacetate.

Key value for chemical safety assessment

Flammability:

non flammable

Additional information

Regarding the result of the auto flammability study with calcium sulphidoacetate and the flammability study with the very similar salt sodium mercaptoacetate it is to conclude that the flammability of calcium sulphidoacetate is even lower than that of sodium mercaptoacetate due to the lower combustible carbon part in addition to crystal water in the calcium salt.