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DIAZINON ICSC: 0137
Date of peer-review: September 1993

O,O-Diethyl-O-(2-isopropyl-6-methylpyrimidin-4-yl)phosphorothioate
Phosphorothioic acid O,O-diethyl O-(6-methyl-2-(1-methylethyl)-4-pyrimidinyl) ester
CAS # 333-41-5 C12H21N2O3PS / (CH3)2CHC4N2H(CH3)OPS(OC2H5)2
RTECS # TF3325000 Molecular mass: 304.4
UN # 3018
EC # 015-040-00-4
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


EXPOSURE
PREVENT GENERATION OF MISTS! STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Convulsions. Dizziness. Laboured breathing. Nausea. Unconsciousness. Vomiting. Pupillary constriction, muscle cramp, excessive salivation.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
Skin MAY BE ABSORBED! Redness. Pain. Pupillary constriction.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Redness. Pain.
Face shield, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal cramps. Diarrhoea. Laboured breathing. Nausea. Unconsciousness. Vomiting. Pupillary constriction. Muscle cramps.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Collect leaking liquid in sealable containers. Absorb remaining liquid in dry sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. (Extra personal protection: P3 filter respirator for toxic particles).
Do not transport with food and feedstuffs. Severe marine pollutant.
EU Classification
Symbol: Xn, N
R: 22-50/53
S: (2-)24/25-60-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61G45b
Provision to contain effluent from fire extinguishing. Separated from acids, alkalis, food and feedstuffs. Dry. Well closed. Keep in a well-ventilated room.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2001

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DIAZINON ICSC: 0137
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
OILY COLOURLESS LIQUID, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
The substance decomposes on heating above 120C producing toxic fumes including nitrogen oxides, phosphorous oxides and sulfur oxides. Reacts with strong acids and alkalis with possible formation of highly toxic tetraethyl thiopyrophosphates.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.1 mg/m^3 (as TWA) (skin) (ACGIH 1993-1994).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion.

INHALATION RISK:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20C; on spraying or dispersing, however, much faster.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes and the skin. The substance may cause effects on the nervous system, resulting in convulsions and respiratory failure. Cholinesterase inhibitor. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Cholinesterase inhibitor; cumulative effect is possible: see Acute Hazards/Symptoms.
PHYSICAL PROPERTIES
Boiling point (decomposes): 120C
Relative density (water = 1): 1.1
Solubility in water, g/100 ml at 20C: none
Vapour pressure, Pa at 20C: very low
Octanol/water partition coefficient as log Pow: 3.11
ENVIRONMENTAL DATA
This substance may be hazardous to the environment; special attention should be given to water organisms and honey bees.
NOTES
Depending on the degree of exposure, periodic medical examination is indicated. Carrier solvents used in commercial formulations may change physical and toxicological properties. Do NOT take working clothes home. Basudin, Diazitol, Neocidol and Nucidol are trade names.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2001

See Also:
        Diazinon (PDS)
        Diazinon (PIM 182)