Substance profile
2,4-D (ISO)
2,4-D (ISO) is a white to yellow crystalline powder and is odorless.
01 · Identification
What 2,4-D (ISO) is
2,4-D (ISO) is a white to yellow crystalline powder and is odorless. It melts at 138 °C.
Under the GHS it carries the signal word Danger. It is classed as carcinogens.
Other names for 2,4-D (ISO)
- 2,4-dichlorophenoxyacetic 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 |
|---|---|
| H302 | Harmful if swallowed. |
| H335 | May cause respiratory irritation. |
| H318 | Causes serious eye damage. |
| H317 | May cause an allergic skin reaction. |
| H412 | Harmful to aquatic life with long lasting effects. |
Precautionary statements: P261, P270, P272, P273, P280, P301, P305, P310, P312, P313, P330, P333, P338, P501
03 · Physical and chemical properties
2,4-D (ISO) 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 | 160 °C (320 °F) | at 4 mmHg (reduced pressure) | HSDB |
| Decomposes | decomposes | NIOSH | |
| Decomposes (NTP, 1992) | decomposes | CAMEO | |
| Melting point | 138 °C (280.4 °F) | HSDB | |
| 137.78 °C (280 °F) | NIOSH | ||
| Density | 1.57 g/cm³ | NIOSH | |
| 1.563 g/cm³ | at 20 °C | CAMEO | |
| 1.42 g/cm³ | at 25 °C | HSDB | |
| Solubility | Needles from alcohol. Solubility in water: 3.5% | HSDB | |
| In water, 677 ppm at 25 °C | at 25 °C | HSDB | |
| Decomposes (NTP, 1992) | decomposes | CAMEO | |
| Vapor pressure | 1.4e-7 mmHg | at 20 °C | HSDB |
| 0 mmHg | at 20 °C | CAMEO | |
| 0.4 mmHg | at 160 °C | NIOSH | |
| Lower explosive limit (LEL) | Noncombustible Solid, but may be dissolved in flammable liquids. | NIOSH | |
| Vapor density | 7.63 (air = 1) | CAMEO | |
| Odor threshold | Detection: 3.13 mg/kg | HSDB | |
| Corrosivity | Forms water-soluble salts with alkali metals and amines | HSDB | |
| Most formulations are noncorrosive to spray equipment although some concentrates may be deleterious to painted surfaces. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling 2,4-D (ISO)
Storage conditions
Conditions for safe storage, including any incompatibilities: Keep container tightly closed in a dry and well-ventilated place. Keep in a dry place. Light sensitive. Moisture sensitive.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Contact with strong oxidizers may cause fires or explosions.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
2,4-DICHLOROPHENOXYACETIC ACID is incompatible with strong oxidizers. It is corrosive to metals. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 2,4-D (ISO) in the storage compatibility matrix →