Substance profile
Benomyl
Benomyl is a white crystalline solid with a faint, acrid odor.
01 · Identification
What Benomyl is
Benomyl is a white crystalline solid with a faint, acrid odor. Its molecular formula is C14H18N4O3 and its molecular weight is 290.32 g/mol. It melts at 300 °C.
Under the GHS it carries the signal word Danger. It is classed as teratogens.
Other names for Benomyl
- benomyl (ISO)
- methyl 1-(butylcarbamoyl)benzimidazol-2-ylcarbamate
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 |
|---|---|
| H340 | May cause genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H360FD | May damage fertility. May damage the unborn child. |
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| 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: P201, P261, P264, P272, P273, P280, P302, P308, P313, P332, P333, P352, P391, P501
03 · Physical and chemical properties
Benomyl 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 | NIOSH |
| Decomposes (NTP, 1992) | decomposes | CAMEO | |
| decomposes | decomposes | OSHA | |
| Melting point | 300 °C (572 °F) | above this value | NIOSH |
| 140 °C (284 °F) | decomposes, decomposes | HSDB | |
| Density | 0.38 g/cm³ | ICSC | |
| Solubility | 0.0004% | NIOSH | |
| In water 3.8 ppm @ 20 °C. | at 20 °C | HSDB | |
| Solubility (25 °C): 18 g/kg acetone; 94 g/kg chloroform; 53 g/kg dimethylformamide; 4 g/kg ethanol; 0.4 g/kg heptane; 10 g/kg xylene. | at 25 °C | HSDB | |
| Vapor pressure | 3.7e-9 mmHg | at 25 °C | HSDB |
| 0.00001 mmHg | below this value | NIOSH | |
| Autoignition temperature | 220 °C (428 °F) | CAMEO | |
| Lower explosive limit (LEL) | LEL= 0.05 g/litre in air | From table | HSDB |
| Noncombustible Solid | NIOSH | ||
| 0.05 g/L (NTP, 1992) | CAMEO | ||
| Corrosivity | NON-CORROSIVE TO METALS | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Benomyl
Storage conditions
Decomposed on storage in contact with water... .
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible with alkaline materials.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
BENOMYL is incompatible with strong acids, peroxides and strong oxidizers. Decomposed by strong alkalis. Also decomposes on storage with water (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Benomyl in the storage compatibility matrix →