Substance profile
2,4,5-T (ISO)
2,4,5-T (ISO) is a white solid and is odorless.
01 · Identification
What 2,4,5-T (ISO) is
2,4,5-T (ISO) is a white solid and is odorless. It melts at 153 °C.
Under the GHS it carries the signal word Warning. It is classed as carcinogens.
Other names for 2,4,5-T (ISO)
- 2,4,5-trichlorophenoxy acetic 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. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P264, P270, P273, P280, P301, P302, P305, P312, P313, P330, P332, P337, P338, P352, P391, P501
03 · Physical and chemical properties
2,4,5-T (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 | Decomposes | decomposes | HSDB |
| Decomposes (NTP, 1992) | decomposes | CAMEO | |
| Melting point | 153 °C (307.4 °F) | HSDB | |
| 152.78 °C (307 °F) | NIOSH | ||
| 157.78 °C (316 °F) | CAMEO | ||
| Density | 1.8 g/cm³ | NIOSH | |
| 1.8 g/cm³ | at 20 °C | HSDB | |
| 1.803 g/cm³ | at 20 °C | CAMEO | |
| Solubility | VERY SLIGHTLY SOL IN PETROLEUM ETHER | HSDB | |
| 590 MG/KG IN ETHANOL OR ISOPROPYL ALC | HSDB | ||
| 0.028% AT 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 1e-7 mmHg | NIOSH | |
| 0 mmHg | at 20 °C | CAMEO | |
| Lower explosive limit (LEL) | available on MS-DOS floppy disketts (3.5" of 5.25") | HSDB | |
| Combustible Solid, but burns with difficulty. | NIOSH | ||
| Corrosivity | Non-corrosive, but some oil based formulations 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 2,4,5-T (ISO)
Storage conditions
DO NOT STORE NEAR OTHER AGROCHEMICALS OR SEEDS. DO NOT STORE IN FREEZING TEMPERATURES.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
None reported
Source: The National Institute for Occupational Safety and Health (NIOSH)
Reactivity
2,4,5-TRICHLOROPHENOXYACETIC ACID is a weak acid. Reacts with organic and inorganic bases to form water-soluble salts and with alcohols to form esters. Incompatible with strong oxidizing agents and strong bases. Can corrode metals, especially if moist. May harm painted surfaces (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 2,4,5-T (ISO) in the storage compatibility matrix →