Reaction mass of Limestone and calcium fluoride and calcium sulfate

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:

12 May 2010 to 02 June 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

GLP guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)

Version / remarks:

UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 4th revised edition, 2003

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

The nano form of calcium carbonate was tested because this form was anticipated to represent the worst case due to the smaller size of the particles and therefore the greater surface area exposed to heat.

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 result of the preliminary screening test obviated the need to perform the main test.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

Not classified as a flammable solid, based on CLP criteria.

Executive summary:

Calcium carbonate (nano) failed to ignite in the UN N1 preliminary screening test.

Reference 2

Endpoint:

self-heating substances / mixtures

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

12 May 2010 to 02 June 2010

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:

UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 4th revised edition, 2003

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

The nano form of calcium carbonate was tested because this form was anticipated to represent the worst case due to the smaller size of the particles and therefore the greater surface area exposed to heat.

Test procedure:

100 mm sample cube at 140°C

Result:

negative outcome (no effect observed)

There were no signs of self-ignition or self heating over the duration of the test.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

Not classified as self-heating, based on CLP criteria.

Executive summary:

A negative result was obtained in the UN N4 test with calcium carbonate (nano).

Reference 3

Endpoint:

flammable solids

Type of information:

not specified

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Remarks:

Authoritative source, peer reviewed.

Principles of method if other than guideline:

No details.

GLP compliance:

not specified

Calcium fluoride is not combustible. (ICSC)

Fluorides are non-flammable compounds. (INRS toxicolological sheet on alkali and alkaline-earth fluorides)

).

Interpretation of results:

not classified based on GHS criteria

Executive summary:

Calcium fluoride is not expected to be a flammable solid, from reliable literature data.

Reference 4

Endpoint:

self-heating substances / mixtures

Data waiving:

other justification

Justification for data waiving:

other:

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with column 2 of REACh Annex VII 7.12, the study does NOT need to be conducted if preliminary results exclude self-heating of the substance up to 400 °C.
As presented under IU Section 4.13 (flammable solids), the substance is non-flammable. Moreover, a melting point of 1403°C is presented under IU section 4.2. So it looks unlikely that the substance would undergo self-heating.
Therefore no additional information is required.

Reference 5

Endpoint:

flammable solids

Data waiving:

study waived due to provisions of other regulation

Justification for data waiving:

other:

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
Calcium sulfate (gypsum) is listed in Annex of Commission Decision 96/603/EC as a Class A (‘No contribution to fire’) material. According to Article 1 of the Decision, the materials, and products made from them, that are listed in the Annex of the Decision, shall, on account of their low level of combustibility and subject to the conditions also set out in the Annex, be classified in Classes A (‘No contribution to fire’) as provided for in tables 1 and 2 of the Annex to Decision 94/611/EC on construction products. As such, flammability testing is deemed unnecessary for calcium sulfate.

Reference 6

Endpoint:

self-heating substances / mixtures

Data waiving:

other justification

Justification for data waiving:

other:

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with column 2 of REACh Annex VII 7.12, the study does NOT need to be conducted if preliminary results exclude self-heating of the substance up to 400 °C.
As presented under IU Section 4.13 (flammable solids), the substance is non-flammable (Class A ‘No contribution to fire’ material, according to construction products legislation). Moreover, a melting point of 1460°C is presented under IU section 4.2. So it looks unlikely that the substance would undergo self-heating.
Therefore no additional information is required.

Reference 7

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

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING

In accordance with section 1 of REACh Annex XI, study for pyrophoric properties, is deemed unnecessary based on the experience in handling, testing and use of the test substance.

Reference 8

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 experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING

In accordance with section 1 of REACh Annex XI, study for flammability if contact with water is deemed unnecessary, based on the experience in handling, testing and use of the substance. In particular the substance as manufactured contains water, and does not exhibit any hazardous reaction.
Furthermore, the test substancewas tested for water solubility, and dissolved without spontaneous ignition.

Description of key information

Based on information on the consituents of the test substance (calcium fluoride, calcium carbonate and calcium sulphate) and information on the test substance it self, we can concluded that the test substante is not classified regarding flammable hazard regarding flammability according to GHS criteria (flammable solid, not a self-heating, pyrophoricity; flammable if contact with water)

Key value for chemical safety assessment

Flammability:

not classified

Additional information

No experimental study is available on the registered reaction mass.

However, data is available for the three constituents, and considered sufficient for hazard assessment.

Calcium fluoride is considered as non-flammable from literature. Calcium sulfate is recommended for low hazard to fire in construction products. For calcium carbonate, a fully reliable experimental study shows no ignition if contact with a flame. No reaction is expected between the salts to form new species. Therefore the reaction mass is not anticipated to be a flammable solid.

In addition, based on high melting point for calcium fluoride and sulfate, and on fully reliable experimental study, negative, on carbonate, no self-heating is anticipated for the reaction mass either.

Based on experience, no pyrophoric properties, or release of flammable gas if contact with water, are anticipated with the registered reaction mass, therefore these studies were deemed unnecessary.