Trisodium bis[4-amino-3-[(2-hydroxy-3,5-dinitrophenyl)azo]naphthalene-1-sulphonato(3-)]chromate(3-)

Stability: thermal, sunlight, metals

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

thermal stability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

according to OECD guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)

GLP compliance:

no

Test substance thermally stable:

no

Key result

Operating temp.:

290 °C

Remarks on result:

other: decomposition energy - 1440 J/g

Sublimation:

not determined

Transformation products:

not measured

Test substance stable to sunlight:

not determined

Test substance stable to metals / metal ions:

not determined

Conclusions:

The test item showed an exothermic effect starting at an onset temperature of 290°C, decomposition energy - 1440 J/g.

Reference 2

Endpoint:

thermal stability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

according to OECD guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)

GLP compliance:

no

Test substance thermally stable:

no

Operating temp.:

280 °C

Remarks on result:

other: M01: decomposition energy - 1130 J/g

Operating temp.:

280 °C

Remarks on result:

other:

Remarks:

M02: decomposition energy - 840 J/g

Key result

Operating temp.:

280 °C

Remarks on result:

other:

Remarks:

M03: decomposition energy - 590 J/g

Sublimation:

not determined

Transformation products:

not measured

Test substance stable to sunlight:

not determined

Test substance stable to metals / metal ions:

not determined

Executive summary:

3 mixtures of the test item with sodium sulphate as desensitizing agent were prepared: 23 % [w/w], 33 % [w/w] and 55.5 [w/w] sodium sulphate content. The mixtures were investigated by DSC. Decomposition started at an onset temperature of 280°C respectively. By increasing the sodium sulphate content the decomposition energy was gradually reduced : - 1130 J/g, - 890 J/g, - 590 J/g.

Description of key information

The thermal stability of Aluminium Grey NL (CAS 74196-16-0) and different mixtures containing sodium sulphate as inert desensitizing agent was investigated according to OECD 113 using Differential Scanning Calometry. The following results were recorded:

Mixture No.	Content of added sodium sulphate [% (w/w)]	Decomposition temperature [°C]	Decomposition energy [J/g]
M00	0	290	- 1440
M01	23	280	- 1130
M02	33	280	- 840
M03	55	280	- 590