Maneb, stabilized

  • [[1,2-Ethanediylbis[carbomodithioato]]-(2-)] manganese
  • Ethylenebis[dithiocarbamic acid], manganous salt
  • Ethylenebis(dithiocarbamato)manganese
  • Maneb preparation, with not less than 60% Maneb
Formula
C4H6MnN2S4
Structure
Description
Maneb (or) maneb preparations is a yellow to brown colored crystalline solid.
Uses
Fungicide for vegetables, for seed treatment of vegetables & field crops, for deciduous fruits & nuts.

Registry Numbers and Inventories.
CAS
12427-38-2
EC (EINECS/ELINCS)
235-654-8
EC Index Number
006-077-00-7
EC Class
Irritant; Sensitising
RTECS
OP0700000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
2968
Beilstein/Gmelin
NA
RCRA
U114
EPA OPP
14505
Swiss Giftliste 1
G-2384
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H6MnN2S4
Formula mass
265.30
Decomposition point, °C
192-204
Vapor pressure, mmHg
8E-8 (25 C)
Density
1.92 g/cm3 (20 C)
Solubility in water
moderately soluble

Hazards and Protection.
Storage
Keep in well-ventilated area. Keep away from fire and sparks. Do not allow wetting or overheating, which could cause deterioration of fungicidal effectiveness and may generate flammable vapors.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate chemical protective clothing.
Respirators
Wear positive pressure self-contained breathing apparatus.
Small spills/leaks
Do not use water. Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Keep material dry.
Stability
May spontaneously decompose vigorously when stored in bulk. Also decomposes at about 100 C.
Decomposition
Decomposes without melting at 192-204 C. Decomposes on prolonged exposure to air or moisture. When heated to decomposition it emits highly toxic fumes of oxides of nitrogen and sulfoxides.

Fire.
Fire fighting
Do not extinguish fire unless flow can be stopped. Do not use water. Use graphite, soda ash, powdered sodium chloride, or suitable dry powder.
Fire potential
Flammable/combustible material.
Hazards
May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV (as Mn): ppm; 5 mg/m3 (as TWA) (ACGIH 1994-1995).
Carcinogin
CP65
Poison_Class
4
Exposure effects
Exposure to thiram or mbdt-carb (based on animal studies) may cause weakness, ataxia, ascending paralysis and hypothermia. Peripheral neuropathy (pain, numbness and weakness of the extremities) has been noted following exposure to thiuram (the ethyl analog of thiram). No adverse reproductive effects (testicular parameters) in male mice were observed following methyl thiophanate doses up to 1000 mg/kg orally for 5 consecutive days (Traina et al, 1998). Maternal toxicity was evident in female rats.
   Ingestion
Nausea, vomiting and diarrhea may occur.
   Inhalation
Respiratory failure, requiring ventilatory support, has been reported following ingestions.
   Skin
Exposure to dusts, sprays, solutions, wettable powder suspensions or emulsions of these agents may lead to skin and mucous membrane irritation.
   Eyes
See Skin.

First aid
 
   Ingestion
Ipecac induced vomiting is not recommended because of the potential for cns depression and seizures. Consider after ingestion of a potentially life-threatening amount of poison if it can be performed soon after ingestion (generally within 1 hour). Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents. Intravenous fluids may be useful in restoring extracellular fluid volume following severe vomiting and diarrhea. Oxygen therapy is effective in relieving the distress of antabuse-like reactions rarely associated with exposure to thiram and possibly the mbdt-carb compounds. No specific antidotes are available for poisoning by these compounds. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   Eyes
In case of contact with substance, immediately flush with running water for at least 20 minutes.

Transport.
UN number
2968
Response guide
Hazard class
4.3
Packing Group
III
 
USCG CHRIS Code
MNB
 
Std. Transport #
4916464