Substance profile
Atrazine
Atrazine is a colorless powder and is odorless.
01 · Identification
What Atrazine is
Atrazine is a colorless powder and is odorless. Its molecular formula is C8H14ClN5 and its molecular weight is 215.68 g/mol. It boils at 205 °C, melts at 177 °C.
Under the GHS it carries the signal word Warning.
02 · Identifiers
Atrazine identifiers and molecular data
Atrazine CAS number and EC number
Atrazine molecular formula and molecular weight
Other names for Atrazine
- atrazine (ISO)
- 2-chloro-4-ethylamine-6-isopropylamine-1,3,5-triazine
03 · GHS classification
Atrazine hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Atrazine pictograms and signal word
Atrazine hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | 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 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Atrazine hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| 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>. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Atrazine. 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 Atrazine
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 Atrazine 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
Atrazine precautionary statements
CLP Annex VI assigns 11 precautionary statements to Atrazine. 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
Atrazine 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 | атразин (ISO) 4-етиламин-6-изопропиламин-2-хлоро-1,3,5-триазин |
| Spanish español | Atrazina (ISO) 2-cloro-4-etilamina-6-isopropilamina-1,3,5-triazina |
| Czech čeština | atrazin (ISO) 2-chlor-4-ethylamino-6-isopropylamino-1,3,5-triazin |
| Danish dansk | atrazin (ISO) 2-chlor-4-ethylamin-6-isopropylamin-1,3,5-triazin |
| German Deutsch | Atrazin (ISO) 2-Chlor-4-ethylamin-6-isopropylamin-1,3,5-triazin |
| Estonian eesti | atrasiin (ISO) 2-kloro-4-etüülamiin-6-isopropüülamiin-1,3,5-triasiin |
| Greek ελληνικά | atrazine (ατραζίνη) (ISO) 2-χλωρο-4-αιθυλαμινο-6-ισοπροπυλαμινο-1,3,5-τριαζίνη |
| English English | atrazine (ISO) 2-chloro-4-ethylamine-6- isopropylamine-1,3,5-triazine |
| French français | atrazine (ISO) 2-chloro-4-éthylamine-6-isopropylamine-1,3,5-triazine |
| Croatian hrvatski | atrazin (ISO) 2-klor-4-etilamin-6-izopropilamin-1,3,5-triazin |
| Italian italiano | atrazina (ISO) 2-cloro-4-etilamino-6-isopropilamino-1,3,5-triazina |
| Latvian latviešu | atrazīns (ISO) 2-hlor-4-etilamīn-6-izopropilamīn-1,3,5-triazīns |
| Lithuanian lietuvių | atrazinas (ISO) 2-chlor-4-etilamino-6-izopropilamino-1,3,5-triazinas |
| Hungarian magyar | atrazin (ISO) 2-klór-4-etilamin-6-izopropilamin-1,3,5-triazin |
| Maltese Malti | atrażin (ISO) 2-kloro-4-etilammina-6-isopropilammina-1,3,5-triażin |
| Dutch Nederlands | atrazine (ISO) 2-chloor-4-ethylamine-6-isopropylamine-1,3,5-triazine |
| Polish polski | atrazyna (ISO) 2-chloro-4-etyloamino-6-izopropyloamino-1,3,5-triazyna |
| Portuguese português | atrazina (ISO) 2-cloro-4-etilamina-6-isopropilamina-1,3,5-triazina |
| Romanian română | atrazin (ISO) 2-cloro-4-etilamino-6-izopropilamino-1,3,5-triazină |
| Slovak slovenčina | atrazín (ISO) N 2 -etyl-6-chlór- N 4 -izopropyl-1,3,5-triazín-2,4-diamín |
| Slovenian slovenščina | atrazin (ISO) 2-kloro-4-etilamino-6-izopropilamino-1,3,5-triazin |
| Finnish suomi | atratsiini (ISO) 2-kloori-4-etyyliamiini-6-isopropyyliamiini-1,3,5-triatsiini |
| Swedish svenska | atrazin (ISO) 2-klor-4-etylamin-6-isopropylamin-1,3,5-triazin |
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
Atrazine GHS label elements
Everything CLP Annex VI fixes for Atrazine, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Warning
Atrazine
- 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>.
- May cause an allergic skin reaction.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Contaminated work clothing should not be allowed out of the workplace.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- Get medical advice/attention.
- Get medical advice/attention if you feel unwell.
- If skin irritation or rash occurs:
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Atrazine in the GHS label constructor →
07 · Health hazards
Atrazine health hazards and exposure limits
Atrazine hazard summary
Atrazine is an herbicide that does not occur naturally. Pure atrazine is an odorless, white powder that is not very volatile, reactive, or flammable and that will dissolve in water. Atrazine is used to kill weeds, primarily on farms, but has also been used on highway and railroad rights-of-way. The EPA now restricts how atrazine can be used and applied; only trained people are allowed to spray it.
Source: Agency for Toxic Substances and Disease Registry (ATSDR)
Atrazine carcinogenicity classification
Cancer Classification: Not Likely to be Carcinogenic to Humans
Source: Hazardous Substances Data Bank (HSDB)
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
Atrazine occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | none See Appendix G | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 5 mg/m³ | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 5 mg/m3 | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | N.D. | The National Institute for Occupational Safety and Health (NIOSH) |
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
Atrazine 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.
Atrazine boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 205 °C (401 °F) | at 757.562 mmHg | HSDB |
| Decomposes | decomposes | NIOSH | |
| Decomposes (NIOSH, 2024) | decomposes | CAMEO |
Atrazine melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 177 °C (350.6 °F) | HSDB | |
| 171.11 °C (340 °F) | NIOSH |
Atrazine density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.23 g/cm³ | at 22 °C | HSDB |
| 1.19 g/cm³ | NIOSH | ||
| 1.2 g/cm³ | at 20 °C, est | CAMEO |
Atrazine solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | 183 g/kg DMSO; 52 g/kg chloroform; 28 g/kg ethyl acetate; 18 g/kg methanol; 12 g/kg diethyl ether; 0.36 g/kg pentane | HSDB | |
| In water, 33.0 mg/L at 25 °C | at 25 °C | HSDB | |
| In water, 34.7 mg/L at 26 °C | at 26 °C | HSDB |
Atrazine vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 3e-7 mmHg | NIOSH | |
| 3e-7 mmHg | at 20 °C | CAMEO | |
| 2.89e-7 mmHg | at 25 °C | HSDB |
Atrazine lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Risk of fire and explosion if formulations contain flammable/explosive solvents. | HSDB | |
| Noncombustible Solid, but may be mixed with flammable liquids. | NIOSH |
Atrazine corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Atrazine technical and formulated products are noncorrosive to equipment and metal surfaces. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Atrazine 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.
Atrazine fire potential
Combustible under specific conditions. Liquid formulations containing organic solvents may be flammable.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Atrazine storage and handling
Atrazine safe storage
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Atrazine storage conditions
Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
Atrazine incompatible materials
Incompatible materials: Strong acids, strong bases, strong oxidizing agents.
Source: Hazardous Substances Data Bank (HSDB)
Atrazine reactivity
ATRAZINE undergoes slow hydrolysis at 158 °F under neutral conditions. Hydrolysis is more rapid in acidic or alkaline conditions. Forms salts with acids (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Atrazine in the storage compatibility matrix →
11 · Questions
Atrazine — frequently asked questions
What is the CAS number of Atrazine?
The CAS number of Atrazine is 1912-24-9. Its EC number is 217-617-8.
What is the chemical formula of Atrazine?
The molecular formula of Atrazine is C8H14ClN5 and its molecular weight is 215.68 g/mol.
What does a Atrazine label have to show?
Under CLP Annex VI the label for Atrazine carries the pictograms Health hazard and Environment and the signal word is Warning.
Is Atrazine flammable?
CLP Annex VI assigns Atrazine 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 Atrazine a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Atrazine. 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. IARC places it in Group 2A: probably carcinogenic to humans.
What is the exposure limit for Atrazine?
The US occupational exposure limit reported for Atrazine is none See Appendix G (The National Institute for Occupational Safety and Health (NIOSH)). 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 boiling point of Atrazine?
The boiling point reported for Atrazine is 205 °C (401 °F), at 757.562 mmHg (HSDB).
What is the melting point of Atrazine?
The melting point reported for Atrazine is 177 °C (350.6 °F) (HSDB).
How should Atrazine be stored?
Keep container tightly closed in a dry and well-ventilated place. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Atrazine
Keep going: substances starting with A, or search the whole database by name, CAS number, pictogram or signal word.