12427-38-2
Product Name:
Maneb
Formula:
C4H6MnN2S4
Synonyms:
Manganese ethylenebis(dithiocarbamate)
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CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Maneb is a yellow powder or crystalline solid. It is denser than water. Contact may irritate skin, eyes and mucous membranes. It may be toxic by ingestion. Likely to generate heat spontaneously upon exposure to air or water. May be sufficient to ignite the material. Maneb is used as a fungicide. Formulations of Maneb include mixing it with many other chemicals such as sulfur, zinc oxide and others to desensitize it. This is done to make it easer for application. |
|---|---|
| Color/Form | Yellow powder; crystals from alcohol |
| Odor | Practically odorless |
| Melting Point | 200 °C (decomposes) |
| Solubility | For more Solubility (Complete) data for Maneb (6 total), please visit the HSDB record page. |
| Density | 1.92 at 25 °C/4 °C |
| Vapor Density | 1.92 |
| Vapor Pressure | 0.00000008 [mmHg] |
| Stability/Shelf Life | Stable under ordinary storage conditions but decomposes more or less rapidly when exposed to moisture or to acids. In presence of moisture decomposition proceeds as in nabam with formation of polymeric ethylene thiuram monosulfide. ... The biological activity of the product remains practically unvaried for 2 yr under environmental conditions, provided the product is stored in its unopened & undamaged original containers, in shaded & possible well-aired places. |
| Decomposition | Decomposes without melting at 192-204 °C. ... Decomposes on prolonged exposure to air or moisture. |
| Polymerization | The heavy metal salts of ethylene bisdithiocarbamic acid, i.e., maneb and zineb, may polymerize, the extent of polymerization depending on the method of preparation. |
| Other Experimental Properties | Decomposes without melting at 192-204 °C |
| Chemical Classes | Pesticides -> Dithiocarbamates (Pesticide) |
SAFETY INFORMATION
| Signal word | Warning |
|---|---|
| Pictogram(s) |
 Exclamation Mark Irritant GHS07  Health Hazard GHS08  Environment GHS09 |
| GHS Hazard Statements |
H317:Sensitisation, Skin H319:Serious eye damage/eye irritation H332:Acute toxicity,inhalation H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P308+P313:IF exposed or concerned: Get medical advice/attention. |
COMPUTED DESCRIPTORS
| Molecular Weight | 265.3 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 3 |
| Exact Mass | 264.879426 g/mol |
| Monoisotopic Mass | 264.879426 g/mol |
| Topological Polar Surface Area | 90.2 Ų |
| Heavy Atom Count | 11 |
| Formal Charge | 0 |
| Complexity | 108 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 2 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Maneb is a yellow powder or crystalline solid. It is denser than water. Contact may irritate skin, eyes and mucous membranes. It may be toxic by ingestion. Likely to generate heat spontaneously upon exposure to air or water. May be sufficient to ignite the material. Maneb is used as a fungicide. Formulations of Maneb include mixing it with many other chemicals such as sulfur, zinc oxide and others to desensitize it. This is done to make it easer for application.