Glycollic acid

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

Deviations:

no

GLP compliance:

yes

Key result

Test procedure:

burning rate test: preliminary screening test

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

The test substance did not ignite during the full 2 minutes of heating.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

The solid form of glycolic acid (glycolic acid >99%) is not highly flammable.

Executive summary:

The flammability of the solid form of glycolic acid (glycolic acid >99%) was investigated according to EC method A.10. The test substance did not ignite during the full 2 minutes of heating. The solid form of glycolic acid is not highly flammable.

Reference 2

Endpoint:

flammable liquids: obsolete as covered by section 'Flash point'

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 3

Endpoint:

self-heating substances / mixtures

Type of information:

experimental study

Adequacy of study:

key study

Study period:

13 January 2021 - 18 August 2021

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances)

Version / remarks:

7

GLP compliance:

yes (incl. QA statement)

Key result

Test procedure:

100 mm sample cube at 140°C

Max. temp. reached:

140

Induction time (h):

24

Result:

negative outcome (no effect observed)

Interpretation of results:

not classified based on GHS criteria

Conclusions:

The test substance is not a self heating substance.

Description of key information

The solid form of glycolic acid is not highly flammable, and not self-heating.

The 70% solution is not a flammable liquid.

Key value for chemical safety assessment

Flammability:

not classified

Justification for classification or non-classification

According to Regulation (EC) No.1272/2008 (CLP) and UN Globally Harmonised System (GHS) criteria:

- the substance did not ignite in the preliminary test of the EC method A.10 (equivalent to the UN N1 test), therefore it is NOT considered as a flammable solid;

- the solid gave a negative result in the UN N4 test, therefore it is NOT considered as a self-heating substance;

- the measured flash point is above the threshold values of 60°C and 93°C respectively, therefore the 70% solution is NOT considered as a flammable liquid.