Substance profile
Sodium hydride
Sodium hydride is a chemical substance with the molecular formula HNa.
01 · Identification
What Sodium hydride is
Sodium hydride is a chemical substance with the molecular formula HNa. Its molecular formula is HNa and its molecular weight is 23.998 g/mol.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Sodium hydride identifiers and molecular data
Sodium hydride CAS number and EC number
Sodium hydride molecular formula and molecular weight
03 · GHS classification
Sodium hydride hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Sodium hydride pictograms and signal word
Sodium hydride hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| In contact with water emits flammable gases GHS chapter 2.12 | Category 1 | H260 | GHS02 |
Sodium hydride hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H260 | In contact with water releases flammable gases which may ignite spontaneously. |
This page lists only the codes assigned to Sodium hydride. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Sodium hydride
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Sodium hydride issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Sodium hydride precautionary statements
CLP Annex VI assigns 4 precautionary statements to Sodium hydride. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Sodium hydride name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | натриев хидрид |
| Spanish español | Hidruro de sodio |
| Czech čeština | hydrid sodný |
| Danish dansk | natriumhydrid |
| German Deutsch | Natriumhydrid |
| Estonian eesti | naatriumhüdriid |
| Greek ελληνικά | υδρίδιο του νατρίου |
| English English | sodium hydride |
| French français | hydrure de sodium |
| Croatian hrvatski | natrijev hidrid |
| Italian italiano | idruro di sodio |
| Latvian latviešu | nātrija hidrīds |
| Lithuanian lietuvių | natrio hidridas |
| Hungarian magyar | nátrium-hidrid |
| Maltese Malti | idrur tas-sodju |
| Dutch Nederlands | natriumhydride |
| Polish polski | wodorek sodu |
| Portuguese português | hidreto de sódio |
| Romanian română | hidrură de sodiu |
| Slovak slovenčina | hydrid sodný |
| Slovenian slovenščina | natrijev hidrid |
| Finnish suomi | natriumhydridi |
| Swedish svenska | natriumhydrid |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Sodium hydride GHS label elements
Everything CLP Annex VI fixes for Sodium hydride, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Sodium hydride
- In contact with water releases flammable gases which may ignite spontaneously.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Handle and store contents under inert gas/…
- In case of fire:
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Sodium hydride in the GHS label constructor →
07 · Transport
Sodium hydride UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
Sodium hydride under UN 1427 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| SODIUM HYDRIDE | 4.3 | W2 | I | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 4.3 is “Substances which, in contact with water, emit flammable gases” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| Sodium hydride | 4.3 | I | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 4.3 is “Dangerous when wet material” (49 CFR 173.2).
08 · Questions
Sodium hydride — frequently asked questions
What is the CAS number of Sodium hydride?
The CAS number of Sodium hydride is 7646-69-7. Its EC number is 231-587-3.
What is the chemical formula of Sodium hydride?
The molecular formula of Sodium hydride is HNa and its molecular weight is 23.998 g/mol.
What does a Sodium hydride label have to show?
Under CLP Annex VI the label for Sodium hydride carries the pictogram Flame and the signal word is Danger.
Is Sodium hydride flammable?
Yes. CLP Annex VI assigns Sodium hydride H260 — in contact with water releases flammable gases which may ignite spontaneously.
Is Sodium hydride a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Sodium hydride. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
Nearby
Substances next to Sodium hydride
Keep going: substances starting with S, or search the whole database by name, CAS number, pictogram or signal word.