Hydrogen
ALDRICH/295396 - ≥99.99%
Synonym: Hydrogen gas
CAS Number: 1333-74-0
Empirical Formula (Hill Notation): H2
Molecular Weight: 2.02
EC Number: 215-605-7
MDL Number: MFCD00070838
Linear Formula: H2
Product Type: Chemical
| assay | ≥99.99% |
| autoignition temp. | 1060 °F |
| bp | −252.8 °C (lit.) |
| expl. lim. | 74.2 % |
| impurities | ≤10 ppm oxygen |
| ≤5 ppm water | |
| InChI | 1S/H2/h1H |
| InChI key | UFHFLCQGNIYNRP-UHFFFAOYSA |
| mp | −259.2 °C (lit.) |
| Quality Level | 200  |
| SMILES string | [H] |
| vapor density | 0.07 (21 °C, vs air) |
| Application: | H2 can be used: • To reduce metal oxide to metal. • In the catalytic hydrogenation of nitro compounds, ketones, and olefinic compounds. |
| General description: | Hydrogen(H2) is colorless, odorless, tasteless, non-toxic, and highly flammable diatomic gas. |
| Legal Information: | Aldrich is a registered trademark of Sigma-Aldrich Co. LLC |
| Other Notes: | See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation |
| Packaging: | 56 L in steel cylinder |
| Packaging: | Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed. Compatible with the following:• Aldrich® lecture-bottle station systems • Aldrich® lecture-bottle gas regulators |
| Symbol |   GHS02,GHS04 |
| Signal word | Danger |
| Hazard statements | H220 - H280 |
| Precautionary statements | P210 - P377 - P381 - P410 + P403 |
| Hazard Codes | F+ |
| Risk Statements | 12 |
| Safety Statements | 9-16-33 |
| RIDADR | UN1049 - class 2 - Hydrogen, compressed |
| WGK Germany | nwg |
| Flash Point(F) | < -238.0 °F - closed cup |
| Flash Point(C) | < -150 °C - closed cup |
| Purity | ≥99.99% |
| bp | −252.8 °C (lit.) |
| mp | −259.2 °C (lit.) |
| UNSPSC | 12142100 |