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.
Other names for Atrazine
- atrazine (ISO)
- 2-chloro-4-ethylamine-6-isopropylamine-1,3,5-triazine
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| 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. |
Precautionary statements: P260, P261, P270, P272, P273, P280, P313, P314, P333, P391, P501
03 · 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.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 205 °C (401 °F) | at 757.562 mmHg | HSDB |
| Decomposes | decomposes | NIOSH | |
| Decomposes (NIOSH, 2024) | decomposes | CAMEO | |
| Melting point | 177 °C (350.6 °F) | HSDB | |
| 171.11 °C (340 °F) | NIOSH | ||
| Density | 1.23 g/cm³ | at 22 °C | HSDB |
| 1.19 g/cm³ | NIOSH | ||
| 1.2 g/cm³ | at 20 °C, est | CAMEO | |
| 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 | |
| Vapor pressure | 3e-7 mmHg | NIOSH | |
| 3e-7 mmHg | at 20 °C | CAMEO | |
| 2.89e-7 mmHg | at 25 °C | HSDB | |
| 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 | ||
| 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.
04 · Handling and storage
Storing and handling Atrazine
Storage conditions
Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible materials: Strong acids, strong bases, strong oxidizing agents.
Source: Hazardous Substances Data Bank (HSDB)
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 →