Substance profile
Maneb
Maneb is yellow powder; crystals from alcohol and is odorless.
01 · Identification
What Maneb is
Maneb is yellow powder; crystals from alcohol and is odorless. Its molecular formula is C4H6MnN2S4 and its molecular weight is 265.3 g/mol. It melts at 200 °C, is soluble in water.
Under the GHS it carries the signal word Warning. It is classed as flammable agents - 3rd degree.
Other names for Maneb
- maneb (ISO)
- manganese ethylenebis(dithiocarbamate) (polymeric)
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 |
|---|---|
| H361d | Suspected of damaging the unborn child. |
| H332 | Harmful if inhaled. |
| H319 | Causes serious eye 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: P260, P261, P264, P271, P272, P273, P280, P304, P305, P312, P313, P333, P337, P338, P391, P501
03 · Physical and chemical properties
Maneb 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 |
|---|---|---|---|
| Melting point | 200 °C (392 °F) | OSHA | |
| 200 °C (392 °F) | decomposes, decomposes | HSDB | |
| Density | 1.92 g/cm³ | ICSC | |
| 1.92 g/cm³ | at 25 °C | HSDB | |
| Solubility | Soluble in chloroform, pyridine | HSDB | |
| Vapor pressure | 7.5e-8 mmHg | OSHA | |
| 7.5e-8 mmHg | at 25 °C | HSDB | |
| 8e-8 mmHg | Haz-Map | ||
| Vapor density | 1.92 (air = 1) | OSHA |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Maneb
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
Practically insoluble in common organic solvents. Soluble in chelating agents (e.g. sodium salts of ethylenediaminetetraacetic acid) with the formation of complexes.
Source: HSDB
05 · Handling and storage
Storing and handling Maneb
Storage conditions
This product must be stored in its sealed original containers, in well-aired places. It is recommended that the product's temperature should not exceed 25-30 °C. The containers must be stacked in such a way as to permit a free circulation of air also at the bottom & inside of the piles.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Water, acid, oxidizing materials. Heat or contact with moisture or acids causes rapid decomposition and the generation of toxic and flammable hydrogen sulfide and carbon disulfide.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
The BPS Pesticide incident in Helena resulted in an explosion and death of three firemen. The burning of a 1,000 pound sack of Azinphos Methyl or the flashing of Maneb which was present on the facility may have caused the explosion.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Maneb in the storage compatibility matrix →