Paraquat dichloride

  • Paraquat chloride
  • Methyl viologen dichloride
  • 1,1'-Dimethyl-4,4'-bipyridinium dichloride
Formula
C12H14N2.2Cl
Structure
Description
Colorless to yellow crystalline solid.
Uses
Herbicide

Registry Numbers and Inventories.
CAS
1910-42-5
EC (EINECS/ELINCS)
217-615-7
EC Index Number
613-090-00-7
EC Class
Very toxic; Toxic; Irritant; Dangerous for the Environment
RTECS
DW2275000
RTECS class
Agricultural Chemical and Pesticide; Drug; Mutagen; Reproductive Effector; Human Data; Primary Irritant
UN (DOT)
2811
Beilstein/Gmelin
3638802
EPA OPP
61601
Swiss Giftliste 1
G-2074
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C12H14N2.2Cl
Formula mass
257.16
Boiling point, °C
175
Decomposition point, °C
300
Vapor pressure, mmHg
<0.001
Vapor density (air=1)
N/R
Density
1.24 g/cm3 (20 C)
Solubility in water
10 g/100nl

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Do not expose to air. Store under an inert atmosphere.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Do not ingest or inhale. Handle under an inert atmosphere. Store protected from air.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation. Place under an inert atmosphere. Cover with dry earth, dry sand, or other non-combustible material followed with plastic sheet to minimize spreading and contact with water.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Hydrogen chloride, nitrogen oxides, carbon monoxide, carbon dioxide, nitrogen.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire, use carbon dioxide, dry chemical powder or appropriate foam.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Avoid strong oxidizers.
Combustion products
During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA PEL: TWA 0.5 mg/m3 (resp) skin NIOSH REL: TWA 0.1 mg/m3 (resp) skin NIOSH IDLH: 1 mg/m3
Poison_Class
1
Exposure effects
Effects may be delayed. Chronic ingestion may cause fetal effects. Laboratory experiments have resulted in mutagenic effects.
   Ingestion
Harmful if swallowed. May cause irritation of the digestive tract. Human systemic effects include acute renal failure, acute tubular necrosis, cough, diarrhea, dyspnea, headache, hypermitility, nausea, vomiting, ulceration or bleeding from stomach.
   Inhalation
May cause respiratory tract irritation. May cause a delayed damaging effect on the lung alveoli.
   Skin
May cause skin irritation. Harmful if absorbed through the skin.
   Eyes
Causes severe eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2811
Response guide
Hazard class
6.1
Packing Group
I; II; III