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EC number: 231-727-3 | CAS number: 7704-99-6
Flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- flammable solids
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- October 11, 2017 (Study initiation) - November 17, 2017 (Study termination)
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)
- Version / remarks:
- rev. 6
- Deviations:
- no
- Principles of method if other than guideline:
- The test item is loosely filled into a mould. The mould is made of metal, has a length of 250 mm and a triangular cross section with an inner height of 10 mm and an inner width of 20 mm. On both sides of the mould in a longitudinal direction two metal sheets are mounted as lateral limitations which project 2 mm beyond the upper edge of the triangular cross section. The mould is dropped three times from a height of 2 cm onto a solid surface. If necessary the mould is filled up again. Then the lateral limitations are removed and the excess substance is scraped off. A non-combustible and non-porous plate is placed on top of the mould, the apparatus is inverted and the mould is removed.
As ignition source a flame is used to ignite the pile at one end. - GLP compliance:
- yes (incl. QA statement)
- Specific details on test material used for the study:
- - Test item: Zirkonhydrid S
- Batch No.: 79408
- Identity: 97.3% Zr
- Physical state: Dark grey powder
- Storage conditions: Ambient temperature (10 octo 30 °C), under inert gas
- Expiry date: September 11, 2018
- Key result
- Test procedure:
- burning rate test over 100 mm length
- Burning time:
- ca. 38 s
- Interpretation of results:
- Category 1 (flammable solids) based on GHS criteria
- Conclusions:
- The flammability of zirconium hydride was tested according to UN Manual of tests and criteria N°1. The burning time was faster than 45 s and the flame passed the wetted zone. Due to these results, ZrH2 is classified as flammable solid, category 1.
Reference
Description of key information
Key value for chemical safety assessment
- Flammability:
- flammable
Additional information
Justification for classification or non-classification
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