Substance profile
Lead diazide
Lead diazide is needles or white powder.
01 · Identification
What Lead diazide is
Lead diazide is needles or white powder. Its molecular formula is N6Pb and its molecular weight is 291 g/mol. It melts at 190 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Lead diazide identifiers and molecular data
Lead diazide CAS number and EC number
Lead diazide molecular formula and molecular weight
Other names for Lead diazide
- lead azide
03 · GHS classification
Lead diazide hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Lead diazide pictograms and signal word
Lead diazide hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Explosives GHS chapter 2.1 | Category Unstable explosive | H200 | GHS01 |
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
| Specific target organ toxicity - repeated exposure GHS chapter 3.9 | Category 2 | H373 | GHS08 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 1 | H410 | GHS09 |
Lead diazide hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H200 | Unstable explosives. |
| H360Df | May damage the unborn child. Suspected of damaging fertility. |
| H332 | Harmful if inhaled. |
| H302 | Harmful if swallowed. |
| H373 | May cause damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Lead diazide. 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 Lead diazide
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 Lead diazide 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
Lead diazide precautionary statements
CLP Annex VI assigns 12 precautionary statements to Lead diazide. 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.
Response
What to do once exposure, spillage or fire has already happened.
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
Lead diazide 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 | оловен диазид оловен азид |
| Spanish español | Diazida de plomo azida de plomo |
| Czech čeština | azid olovnatý |
| Danish dansk | blydiazid blyazid |
| German Deutsch | Bleidiazid Bleiazid |
| Estonian eesti | pliidiasiid pliiasiid |
| Greek ελληνικά | διαζίδιο του μολύβδου αζίδιο του μολύβδου |
| English English | lead diazide lead azide |
| French français | diazoture de plomb azoture de plomb |
| Croatian hrvatski | olovov diazid olovov azid |
| Italian italiano | diazoturo di piombo lead azide |
| Latvian latviešu | svina diazīds svina azīds |
| Lithuanian lietuvių | švino diazidas švino azidas |
| Hungarian magyar | ólom-diazid ólom-azid |
| Maltese Malti | diażid taċ-ċomb ażid taċ-ċomb |
| Dutch Nederlands | looddiazide loodazide |
| Polish polski | diazydek ołowiu azydek ołowiu(II)azydek ołowiawy |
| Portuguese português | diazida de chumbo azida de chumbo |
| Romanian română | diazidă de plumb azidă de plumb |
| Slovak slovenčina | azid olovnatý |
| Slovenian slovenščina | svinčev diazid svinčev azid |
| Finnish suomi | lyijydiatsidi lyijyatsidi |
| Swedish svenska | blydiazid blyazid |
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
Lead diazide GHS label elements
Everything CLP Annex VI fixes for Lead diazide, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Lead diazide
- Unstable explosives.
- May damage the unborn child. Suspected of damaging fertility.
- Harmful if inhaled.
- Harmful if swallowed.
- May cause damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Use only outdoors or in a well-ventilated area.
- Avoid release to the environment.
- IF SWALLOWED:
- IF INHALED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention if you feel unwell.
- Rinse mouth.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Lead diazide in the GHS label constructor →
07 · Health hazards
Lead diazide health hazards and exposure limits
Lead diazide hazard summary
Unstable when dry, and may explode after shock, heat, or friction; [CAMEO] Emits fumes of lead and nitrogen oxides when heated; [Sax] Keep submerged in water when handling; Explodes at 660 deg F; Reported cause of explosions in laboratories after azide poured down sinks and comes in contact with lead in pipes; [Hawley] Workers handling this substance are at risk for lead poisoning; [NJ-HSFS] See AZIDES. See Lead and linked occupational diseases.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Lead diazide occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 0.05 [mg/m3], as Pb | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
Lead diazide properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
Lead diazide melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 190 °C (374 °F) | decomposes | HSDB |
Lead diazide density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 4.7 g/cm³ | HSDB |
Lead diazide solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Freely sol in acetic acid; insol in ammonium hydroxide | HSDB | |
| In water, 0.023% at 18 °C, 0.09% at 70 °C | at 18 °C | HSDB |
Lead diazide lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | An explosive sensitive to shock or heating to 250 °C. Will explode spontaneously during crystallization. | HSDB | |
| If it should dry out, it may explode or detonate due to shock, heat, flame, or friction ... Under prolonged exposure to fire or heat can explode. | HSDB | ||
| Severe explosion risk, detonates at 350 °C (660 °F). | at 350 °C | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Lead diazide storage and handling
Lead diazide incompatible materials
Mixtures with calcium stearate may explode spontaneously. May explode spontaneously after prolonged contact with copper, zinc, or their alloys (e.g., brass). Incompatible with /carbon disulfide/.
Source: Hazardous Substances Data Bank (HSDB)
Lead diazide reactivity
LEAD AZIDE is unstable. May, when dry, decompose explosively if shocked, heated or subjected to friction. Forms violently explosive products with carbon disulfide. Can be sensitized to explosive decomposition by metal salts (copper or zinc) or by traces of strong acids [Sax, 9th ed., 1996, p. 298]. An explosion occurred by mixing lead azide with 0.5% of calcium stearate, [MCA Case History No. 949].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Lead diazide in the storage compatibility matrix →
10 · Transport
Lead diazide 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.
Lead diazide under UN 0129 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| LEAD AZIDE, WETTED with not less than 20 % water, or mixture of alcohol and water, by mass | 1 | 1.1A | — | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 1 is “Explosive substances and articles” (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) |
|---|---|---|---|
| Lead azide, wetted with not less than 20 percent water or mixture of alcohol and water, by mass | 1.1A | — | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 1.1A is “Explosives (with a mass explosion hazard)” (49 CFR 173.2).
11 · Questions
Lead diazide — frequently asked questions
What is the CAS number of Lead diazide?
The CAS number of Lead diazide is 13424-46-9. Its EC number is 236-542-1.
What is the chemical formula of Lead diazide?
The molecular formula of Lead diazide is N6Pb and its molecular weight is 291 g/mol.
What does a Lead diazide label have to show?
Under CLP Annex VI the label for Lead diazide carries the pictograms Exploding bomb, Health hazard, Exclamation mark and Environment and the signal word is Danger.
Is Lead diazide flammable?
CLP Annex VI assigns Lead diazide no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.
Is Lead diazide a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Lead diazide. 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.
What is the exposure limit for Lead diazide?
The US occupational exposure limit reported for Lead diazide is 0.05 [mg/m3], as Pb (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the melting point of Lead diazide?
The melting point reported for Lead diazide is 190 °C (374 °F), decomposes (HSDB).
Nearby
Substances next to Lead diazide
Keep going: substances starting with L, or search the whole database by name, CAS number, pictogram or signal word.