Input interpretation
![hydrogen | DOT numbers](../image_source/4a19defe79950125fc04cee1fa4dd69a.png)
hydrogen | DOT numbers
Result
![1966](../image_source/a014579fd14bec41fdc8fc421691487f.png)
1966
NFPA label
![NFPA label](../image_source/1b7be0085c76d55bd79bb402f382aa37.png)
NFPA label
![NFPA health rating | 3 NFPA fire rating | 4 NFPA reactivity rating | 0](../image_source/f0f50894a0979d669c8b5e6e701b4122.png)
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)](../image_source/a89a4f58e5a335aba05e2ab46e4b281e.png)
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](../image_source/be94f6d1e5476555061fc4b4846930c4.png)
DOT hazard class | 2.1 DOT numbers | 1966
Toxicity properties
![odor | odorless](../image_source/baa696094e0cf35ff35ae08b576b5697.png)
odor | odorless
![RTECS classes | other](../image_source/820c5a8c49d82329b065d56b9460efa0.png)
RTECS classes | other