Phosphoric acid, C14-15-branched and linear alkyl esters, potassium salts

Flammability

Link to relevant study record(s)

Reference

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018

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.1 (Test method for readily combustible solids)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Name: Phosphoric acid, C14-15 branched and linear alkyl esters, potassium salts
CAS No.: 1893414-79-3
Physical state: white solid at 20 °C
Batch No.: PU61810016
Re-certification date of batch: 09 March 2018
Purity: 100 % (UVCB, lyophilized solid, water content 0.85 % (w/w))
Stability: stable under test conditions
Storage condition of test material: Room temperature, protected from light

Key result

Test procedure:

burning rate test with wetted zone

Burning time:

>= 56 - <= 110 s

Moisture (wt %):

0.95

Remarks on result:

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

Preliminary test

The test was started by trying to ignite the pile at one end over a period of 2 minutes (5 minutes for powders of metals or metal alloys). After a successful ignition the burning time for propagation of 200 mm was determined.

The substance propagated burning of a 200 mm length of the powder train in less than two minutes, so a main test was performed.

Main test

Deionised water containing 1 % Mucasol as wetting agent was used as wetting solution. The content of active matter in the wetting solution did not exceed 1 %. A fresh pile was prepared. 1 mL of the wetting solution was added to the pile 30 - 40 mm beyond the 100 mm timing zone. It was not possible to add the wetting solution to a hollow up to 3 mm deep and 5 mm in diameter in the top of the pile without loss. Therefore it was decided to add the wetting solution at the bottom of the pile before the plate was placed on the top of the mould. Afterwards the apparatus was inverted and the mould was removed. The pile was ignited at one end. When the pile burned a distance of 80 mm, the rate of burning over the next 100 mm was measured. The test was performed six times, using a clean cool plate each time.

The time the wetted zone stops the flame propagation was measured.

Interpretation of results:

GHS criteria not met

Conclusions:

The test was carried out according to UN method N.1. The shortest burning time of the test item observed in the main test was 56 seconds and the flame went off in the wetting zone. Therefore the test item is not classified as flammable solid.

Executive summary:

The test was carried out according to UN method N.1. The shortest burning time of the test item observed in the main test was 56 seconds and the flame went off in the wetting zone. Therefore the test item is not classified as flammable solid.

Description of key information

The test was carried out according to UN method N.1. The shortest burning time of the test item observed in the main test was 56 seconds and the flame went off in the wetting zone. Therefore the test item is not classified as flammable solid.

Key value for chemical safety assessment

Flammability:

not classified