Input interpretation
hydrogen | DOT numbers
Result
1966
NFPA label
NFPA label
NFPA health rating | 3 NFPA fire rating | 4 NFPA reactivity rating | 0
Safety properties
flash point | -18 °C autoignition point | 535 °C lower explosive limit | 4% (concentration in air) upper explosive limit | 76% (concentration in air)
DOT hazard class | 2.1 DOT numbers | 1966
Toxicity properties
odor | odorless
RTECS classes | other