Slimes and sludges, electrolytic refining of tin, lead and silver containing alloy

Flammability

Link to relevant study record(s)

Reference

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27/09/2018-18/10/2018

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.4 (Test method for self-heating substances)

Version / remarks:

Recommendations on the Transport of Dangerous Goods: Manual of Tests and Criteria, 6th edition, New York and Geneva, 2015: Appendix 6 Screening Procedures, Division 4.2: Substances which may be liable to spontaneous combustion

Deviations:

not specified

Qualifier:

according to guideline

Guideline:

other: VDI 2263 (1990) sheet 1, Grewer Oven

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

pure test item

Interpretation of results:

Category 1 (self-heating substances and mixtures) based on GHS criteria

Conclusions:

The pure test item Slimes and sludges, electrolytic tin refining indicated a self-heating at atmospheric pressure starting at a temperature of approx. 200°C, which leaded to a maximum temperature of 340°C.
On the basis of the results of the screening test on the self-heating in the Grewer Oven a classisifcation of the test item as self-heating substance cannot be excluded.

Executive summary:

The relative self-ignition temparute of the test item Slimes and sludges, electrolytic tin refining was tested according to

- Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria, 6th edition, New York and Geneva, 2015: Appendix 6 Screening Procedures, Division 4.2: Substances which may be liable to spontaneous combustion

-VDI 2263 (1990), sheet 1, Grewer Oven

In the investigation of self-heating in the Grewer Oven for the pure test item initially an endothermic effect was detected in the temperature range of 40 -120°C. An exothermic effect was detected starting at 200°C, which led to a maximum temperature of 340°C.

The pure test item Slimes and sludges, electrolytic tin refining indicated a self-heating at atmospheric pressure starting at a temperature of approx. 200°C, which leaded to a maximum temperature of 340°C. On the basis of the results of the screening test on the self-heating in the Grewer Oven a classisifcation of the test item as self-heating substance cannot be excluded.

Description of key information

The pure test item 'Slimes and sludges electrolytic refining of tin, lead and silver containing alloy' (formerly called Slimes and sludges, electrolytic tin refining) indicated a self-heating at atmospheric pressure starting at a temperature of approx. 200°C, which lead to a maximum temperature of 340°C.

Key value for chemical safety assessment

Flammability:

flammable

Justification for classification or non-classification

On the basis of the results of the screening test on the self-heating in the Grewer Oven a classisifcation of the test item as self-heating substance cannot be excluded. Based on a precautionary principle, the substance is classified as Flammable solid Cat. 1 (H228) and Self Heating Cat. 1 (H251).