# NIOSH Pocket Guide to Chemical Hazards
Diquat (Diquat dibromide) | CAS 85-00-7
C12H12N2Br2 | RTECS JM5690000
Synonyms & Trade Names Diquat dibromide; 1,1'-Ethylene-2,2'-bipyridyllium dibromide [Note: Diquat is a cation (C12H12N2++; 1,1'-Ethylene-2,2-bipyridyllium ion). Various diquat salts are commercially available.] | DOT ID & Guide 2781 151 (solid) 2782 131 (liquid)
Exposure Limits | NIOSH REL: TWA 0.5 mg/m3
OSHA PEL†: none
IDLH N.D. | Conversion
Physical Description Dibromide salt: Yellow crystals. [herbicide] [Note: Commercial product may be found in a liquid concentrate or a solution.]
MW: 344.1 | BP: Decomposes | MLT: 635°F | Sol: 70%
VP: <0.00001 mmHg | IP: ? |  | Sp.Gr: 1.22-1.27
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Solid, but does not readily ignite and burns with difficulty.
Incompatibilities & Reactivities Alkalis, UV light, basic solutions [Note: Concentrated diquat solutions corrode aluminum.]
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: Daily Provide: Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, mucous membrane, respiratory system; rhinorrhea (discharge of thin mucus), epistaxis (nosebleed); skin burns; nausea, vomiting, diarrhea, malaise (vague feeling of discomfort); kidney, liver injury; cough, chest pain, dyspnea (breathing difficulty), pulmonary edema; tremor, convulsions; delayed healing of wounds
Target Organs Eyes, skin, respiratory system, kidneys, liver, central nervous system
See also: INTRODUCTION