Substance profile
Dicamba
Dicamba is crystals from pentane and is odorless.
01 · Identification
What Dicamba is
Dicamba is crystals from pentane and is odorless. Its molecular formula is C8H6Cl2O3 and its molecular weight is 221.03 g/mol. It boils at 200 °C, melts at 115 °C.
Under the GHS it carries the signal word Danger.
Other names for Dicamba
- dicamba (ISO)
- 2,5-dichloro-6-methoxybenzoic acid
- 3,6-dichloro-2-methoxybenzoic acid
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 |
|---|---|
| H332 | Harmful if inhaled. |
| H302 | Harmful if swallowed. |
| H335 | May cause respiratory irritation. |
| H336 | May cause drowsiness or dizziness. |
| H318 | Causes serious eye damage. |
| H400 | Very toxic to aquatic life. |
| H411 | Toxic to aquatic life with long lasting effects. |
Precautionary statements: P260, P270, P271, P273, P280, P301, P304, P305, P310, P312, P330, P338, P391, P501
03 · Physical and chemical properties
Dicamba 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 | 200 °C (392 °F) | above this value | HSDB |
| Melting point | 114.9 °C (238.8 °F) | HSDB | |
| 115 °C (239 °F) | range, midpoint shown | HSDB | |
| Density | 1.57 g/cm³ | ICSC | |
| 1.57 g/cm³ | at 25 °C | HSDB | |
| Solubility | In water, 8310 mg/L at 25 °C | at 25 °C | HSDB |
| In water, 6.6 (pH 1.8), >250 (pH 4.1, 6.6, 8.2) (all in g/L at 25 °C) | at 25 °C | HSDB | |
| Vapor pressure | 33750 mmHg | at 25 °C | HSDB |
| 0.0000125 mmHg | at 25 °C | HSDB | |
| 0.00003375 mmHg | at 25 °C | ICSC | |
| Flash point | Not Applicable. Not flammable. (USCG, 1999) | CAMEO | |
| Autoignition temperature | Not Applicable. Not flammable. (USCG, 1999) | CAMEO | |
| Lower explosive limit (LEL) | Not Applicable. Not flammable. (USCG, 1999) | CAMEO | |
| Upper explosive limit (UEL) | Not Applicable. Not flammable. (USCG, 1999) | CAMEO | |
| Vapor density | 7.62 (air = 1) | CAMEO | |
| Odor threshold | /SRP: Air/ 250.8 PPM | HSDB | |
| Corrosivity | Mild to noncorrosive | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Dicamba
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.
Solubility
Water: 4500 mg/L at 25 °C. Solubility in organic solvents (g/100 mL at 25 °C): ethanol 92.2; heavy aromatic naphthanes 5.2; xylene 20.2; diacetone alcohol 91; acetone 126; dichloromethane 26; cyclohexanone 91.6; n-heane 0.375; methanol 137; carbon disulfide 127; chloroform 51.6; 1-octanol 68; tetrahydrofuran 139; dioxane 118; toluene 13; soluble in methyl ethyl ketone; insoluble in pentane
Source: HSDB
05 · Handling and storage
Storing and handling Dicamba
Storage conditions
Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible materials: Strong oxidizing agents.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
DICAMBA is a chlorinated benzoic acid derivative. Reacts as a weak acid to neutralize bases, both organic (for example, the amines) and inorganic. May corrode iron, steel, and aluminum parts and containers if moist. Reacts with cyanide salts in the presence of moisture to generate gaseous hydrogen cyanide. May react if moist with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, may initiate polymerization reactions or catalyze other reactions.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Dicamba in the storage compatibility matrix →