Substance profile
1H-1,2,4-Triazole
1H-1,2,4-Triazole is needles from benzene/ethanol.
01 · Identification
What 1H-1,2,4-Triazole is
1H-1,2,4-Triazole is needles from benzene/ethanol. It boils at 260 °C, melts at 121 °C, is soluble in water.
Under the GHS it carries the signal word Danger.
02 · Identifiers
1H-1,2,4-Triazole identifiers and molecular data
1H-1,2,4-Triazole CAS number and EC number
Other names for 1H-1,2,4-Triazole
- 1,2,4-triazole
03 · GHS classification
1H-1,2,4-Triazole hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
1H-1,2,4-Triazole pictograms and signal word
1H-1,2,4-Triazole hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | GHS07 |
1H-1,2,4-Triazole hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H360FD | May damage fertility. May damage the unborn child. |
| H302 | Harmful if swallowed. |
| H319 | Causes serious eye irritation. |
This page lists only the codes assigned to 1H-1,2,4-Triazole. 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 1H-1,2,4-Triazole
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 1H-1,2,4-Triazole 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
1H-1,2,4-Triazole precautionary statements
CLP Annex VI assigns 10 precautionary statements to 1H-1,2,4-Triazole. 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.
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
1H-1,2,4-Triazole 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 | 1,2,4-триазол |
| Spanish español | 1,2,4-Triazol |
| Czech čeština | 1,2,4-triazol |
| Danish dansk | 1,2,4-triazol |
| German Deutsch | 1,2,4-Triazol |
| Estonian eesti | 1,2,4-triasool |
| Greek ελληνικά | 1,2,4-τριαζόλη |
| English English | 1,2,4-triazole |
| French français | 1,2,4-triazole |
| Croatian hrvatski | 1,2,4-triazol |
| Italian italiano | 1,2,4-triazolo |
| Latvian latviešu | 1,2,4-triazols |
| Lithuanian lietuvių | 1,2,4-triazolas |
| Hungarian magyar | 1,2,4-triazol |
| Maltese Malti | 1,2,4-triażol |
| Dutch Nederlands | 1,2,4-triazool |
| Polish polski | 1,2,4-triazol |
| Portuguese português | 1,2,4-triazole |
| Romanian română | 1,2,4-triazol |
| Slovak slovenčina | 1,2,4-triazol |
| Slovenian slovenščina | 1,2,4-triazol |
| Finnish suomi | 1,2,4-triatsoli |
| Swedish svenska | 1,2,4-triazol |
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
1H-1,2,4-Triazole GHS label elements
Everything CLP Annex VI fixes for 1H-1,2,4-Triazole, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
1H-1,2,4-Triazole
- May damage fertility. May damage the unborn child.
- Harmful if swallowed.
- Causes serious eye irritation.
- Wash … thoroughly after handling.
- Do not eat, drink or smoke when using this product.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF IN EYES:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- Rinse mouth.
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 1H-1,2,4-Triazole in the GHS label constructor →
07 · Health hazards
1H-1,2,4-Triazole health hazards and exposure limits
1H-1,2,4-Triazole hazard summary
An eye irritant; Can be absorbed through skin; Animal tests show that this substance possibly causes toxicity to human reproduction or development. [ICSC] An eye irritant; [eChemPortal: ERMA; ESIS] An irritant; [MSDSonline]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
1H-1,2,4-Triazole 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.
1H-1,2,4-Triazole boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 260 °C (500 °F) | ICSC | |
| 260 °C (500 °F) | decomposes, decomposes | HSDB |
1H-1,2,4-Triazole melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 120.5 °C (248.9 °F) | range, midpoint shown | ICSC |
1H-1,2,4-Triazole density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.64 g/cm³ | ICSC |
1H-1,2,4-Triazole solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Soluble in water, ethanol | HSDB | |
| Solubility in water, g/100ml at 20 °C: 125 | at 20 °C | ICSC |
1H-1,2,4-Triazole vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.0015 mmHg | at 20 °C | ICSC |
| 0.6 mmHg | Haz-Map |
1H-1,2,4-Triazole flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 170 °C (338 °F) | HSDB |
1H-1,2,4-Triazole autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 490 °C (914 °F) | HSDB |
1H-1,2,4-Triazole lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Finely dispersed particles form explosive mixtures in air. | HSDB | |
| May explode on heating. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
1H-1,2,4-Triazole fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
1H-1,2,4-Triazole fire potential
Combustible
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
1H-1,2,4-Triazole storage and handling
1H-1,2,4-Triazole safe storage
Separated from strong oxidants and strong acids. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
1H-1,2,4-Triazole storage conditions
Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
1H-1,2,4-Triazole incompatible materials
Reacts with strong acids and strong oxidants.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check 1H-1,2,4-Triazole in the storage compatibility matrix →
11 · Questions
1H-1,2,4-Triazole — frequently asked questions
What is the CAS number of 1H-1,2,4-Triazole?
The CAS number of 1H-1,2,4-Triazole is 288-88-0. Its EC number is 206-022-9.
What does a 1H-1,2,4-Triazole label have to show?
Under CLP Annex VI the label for 1H-1,2,4-Triazole carries the pictograms Health hazard and Exclamation mark and the signal word is Danger.
Is 1H-1,2,4-Triazole flammable?
CLP Annex VI assigns 1H-1,2,4-Triazole 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. The flash point reported for it is 170 °C (338 °F) (HSDB).
Is 1H-1,2,4-Triazole a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 1H-1,2,4-Triazole. 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 boiling point of 1H-1,2,4-Triazole?
The boiling point reported for 1H-1,2,4-Triazole is 260 °C (500 °F) (ICSC).
What is the melting point of 1H-1,2,4-Triazole?
The melting point reported for 1H-1,2,4-Triazole is 120.5 °C (248.9 °F), range, midpoint shown (ICSC).
How should 1H-1,2,4-Triazole be stored?
Keep container tightly closed in a dry and well-ventilated place. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to 1H-1,2,4-Triazole
Keep going: substances starting with 0–9, or search the whole database by name, CAS number, pictogram or signal word.