Mobam

  • Mobam phenol
  • 4-Benzothienyl N-methylcarbamate
  • 4-Benzothienyl methylcarbamate
  • Benzo[b]thien-4-yl methylcarbamate
  • Benzo[b]thiophene-4-ol, methylcarbamate
Formula
C10H9NO2S
Structure
Description
White, crystalline solid. Odorless.
Uses
Contact & residual insecticide - former use.

Registry Numbers and Inventories.
CAS
1079-33-0
RTECS
FB4725000
RTECS class
Agricultural Chemical and Pesticide
UN (DOT)
2991
Beilstein/Gmelin
1427973
Beilstein Reference
5-17-04-00199
EPA OPP
90401
Swiss Giftliste 1
G-5187

Properties.
Formula
C10H9NO2S
Formula mass
207.26
Melting point, °C
129 - 131
Boiling point, °C
337
Critical temperature
566
Critical pressure
35.6
Solubility in water
Insoluble
pKa/pKb
12.13 (pKa)
Partition coefficient, pKow
2.51

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
Personal protective equipment should be issued to the workers engaged in the production of carbamates or in their agricultural use, in particular, eye protectors and respirators to those who spray crops. Wear boots, protective gloves, and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Make no contact with the spilled material. Fully encapsulating, vapor protective clothing should be worn for spills and leaks with no fire. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.
Stability
It is stable to heat up to 100 C. Stable at neutral or slightly acid ph, but at pH 9 it is hydrolyzed to 4-hydroxybenzothiophene, methylamine, and carbon dioxide.

Fire.
Fire fighting
If material on fire or involved in fire: Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use alcohol foam, carbon dioxide or dry chemical.
Fire potential
Flammable
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion and poison hazard indoors, outdoors or in sewers.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
3
Exposure effects
In severe poisoning, respiratory depression, mental confusion, unconsciousness, brain hemorrhages, and seizures may occur. Children may be more susceptible to seizures than adults. Headache, blurred vision, tremor, paresis, mental depression, coma, delayed neuropathies, various dystonias, weakness, muscle twitching may be noted.
   Ingestion
Nausea, vomiting, diarrhea, and abdominal cramping have been reported and are common.
   Inhalation
Dyspnea, wheezing, rales, increased bronchial secretions, respiratory muscle weakness and respiratory failure may occur. Usual cause of death is respiratory failure.
   Skin
A possible occupational effect is contact dermatitis. Diaphoresis may be seen after exposure. Cellulitis was seen after injection of household spray.
   Eyes
See inhalation.

First aid
 
   Ingestion
Do not induce emesis. 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 jewelry. Wash the skin, including hair and nails, vigorously; do repeated soap washings. Discard contaminated clothing.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
2991
Response guide
Hazard class
6.1
Packing Group
I; II; III