Sulfuric acid, mono-C12-14-alkyl esters, magnesium salts

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

6 Feb 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: UN Test Method N.1

GLP compliance:

no

Test procedure:

burning rate test: preliminary screening test

Burning time:

ca. 1 min

Remarks on result:

other: full test required

Test procedure:

burning rate test over 100 mm length

Burning time:

33 s

Test procedure:

burning rate test with wetted zone

Remarks on result:

wetted zone stops propagation of the flame for at least 4 minutes

Remarks:

the flame is stopped by the wetted zone and extinguishes after 2 minutes

The test item is to be classified as a readily combustible solid of the UN-class 4.1, category III.

Reference 2

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is known to be soluble in water to form a stable mixture

Reference 3

Endpoint:

pyrophoric solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied

Description of key information

flammable as dry pulverized substance (burning time: 33 s, burning rate: 30 mm/s), wetted zone stops the propagation of fire
no pyrophoricity
no flammability on contact with water

Additional information

The dried substance is flammable as determined in the test according to UN Test Method N.1., however the substance is marketed solely in the high water content states (paste or aqueous solution). According to the manufacturer's experience, and available experimental evidence on a variety of alkyl sulfates, solid forms of bulk density < 400 g/L are flammable on ignition, whereas solid forms of higher bulk density > 400 g/L are non-flammable. In terms of aggregate state, this corresponds approximately to powders and granulates, respectively.

Based on experience in handling and use and the chemical structure, pyrophoricity and flammability on contact with water are not to be expected.

Justification for classification or non-classification

According to Regulation (EC) No 1272/2008 on classification, labelling and packaging (CLP) of substances and mixtures, the dry substance in solid forms of bulk density < 400 g/L is considered to be a flammable solid, Category 1, and as R11 according to Directive 67/548/EEC. In addition, the test item is to be classified as a readily combustible solid of the UN-class 4.1, category III.

Based on the chemical structure and experience in handling and use, pyrophoricity and flammability on contact with water are not expected.