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EC number: 231-179-5 | CAS number: 7440-70-2
Auto flammability
Administrative data
Link to relevant study record(s)
Description of key information
Long-term industrial experience in handling shows that this property is strongly related to the particle size. Furthermore, the presented values demonstrate that the self-ignition temperature can also vary depending on the surrounding conditions (moisture, type of atmosphere, etc.). In steam the self-ignition temperature is approximately 470 deg. C, whereas in a nitrogen atmosphere the value is as high as 910 deg. C. For calcium chips the self-ignition temperature is between 730-750 deg. C (1.0-1.8mm) and 765-770 deg. C (4.0mm) for different sizes, respectively. These values were obtained from the following handbook: Baratov, A.N., Korolchenko, A.Y., Kravchuk, G.N. Eds. (1990). Fire and Explosion Hazard of Substances and Materials and Extinguishing Means (published in Russian), Moscow Chemistry, Russian Federation.
Key value for chemical safety assessment
- Autoflammability / Self-ignition temperature at 101 325 Pa:
- 720 °C
Additional information
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