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NIOSH

DICROTOPHOS

ICSC: 0872

(E)-3 (Dimethyloamino)-1-methyl-3-oxoprop-1-enyl dimethyl phosphate
Dimethyl cis-2-dimethylcarbamoyl-1-methylvinyl phosphate
C8H16NO5P
Molecular mass: 237.2
ICSC # 0872 		CAS # 141-66-2
RTECS # TC3850000
UN # 3018
EC # 015-073-00-4
March 23, 1998 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Powder, water spray, foam, carbon dioxide.
EXPLOSION Above 93°C explosive vapour/air mixtures may be formed. Risk of fire and explosion if formulations contain flammable/explosive solvents.
Above 93°C use a closed system, ventilation.

EXPOSURE
PREVENT GENERATION OF MISTS! STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!
IN ALL CASES CONSULT A DOCTOR!
•INHALATION Nausea. Dizziness. Vomiting. Laboured breathing. Sweating. Pupillary constriction, muscle cramp, excessive salivation. Unconsciousness. Convulsions.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
•SKIN MAY BE ABSORBED! Muscle twiching at first. (Further see Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
•EYES Blurred vision.
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. Vomiting. (Further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Personal protection: complete protective clothing including self-contained breathing apparatus. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT let this chemical enter the environment.
Separated from food and feedstuffs. Keep in a well-ventilated room. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
Do not transport with food and feedstuffs.
Marine pollutant.
T+ symbol
N symbol
R: 24-28-50/53
S: 1/2-28-36/37-45-60-61
UN Hazard Class: 6.1
UN Packing Group: II
ICSC: 0872 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

DICROTOPHOS

ICSC: 0872

I

M

P

O

R

T

A

N

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D

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A

PHYSICAL STATE; APPEARANCE:
YELLOW TO BROWN LIQUID , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating and on burning producing toxic and corrosive fumes including nitrogen oxides, phosphorus oxides, carbon monoxide. Attacks some metals. The substance may decompose after prolonged storage (see Notes).

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (Inhalable fraction & vapour) 0.05 mg/m3; (skin); A4 (not classifiable as a human carcinogen); BEI issued (ACGIH 2008).
MAK not established.
OSHA PEL†: none
NIOSH REL: TWA 0.25 mg/m3 skin
NIOSH IDLH: N.D. See: IDLH INDEX


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance may cause effects on the nervous system , resulting in convulsions, respiratory failure. Cholinesterase inhibitor. Exposure far above the OEL may result in death. 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

Decomposes below boiling point at 75°C after 31 days and at 90°C after 7 days
Relative density (water = 1): 1.216 at 15°C
Solubility in water:
miscible
Vapour pressure, Pa at 20°C: 0.013
Flash point: >93°C c.c.
Octanol/water partition coefficient as log Pow: -0.49

ENVIRONMENTAL
DATA

The substance is toxic to aquatic organisms. This substance may be hazardous to the environment; special attention should be given to birds. Avoid release to the environment in circumstances different to normal use.

N O T E S

The substance is stable when stored in glass or polyethylene containers up to 40°C. Explosive limits are unknown in literature, although the substance is combustible. Depending on the degree of exposure, periodic medical examination is indicated. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. If the substance is formulated with solvent(s) also consult the card(s) (ICSC) of the solvent(s). Carrier solvents used in commercial formulations may change physical and toxicological properties. Do NOT take working clothes home. Bidrin, Carbicron, Ektafos and Diapadrin are trade names.
Transport Emergency Card: TEC (R)-61G43b
Card has been partially updated in November 2008: see Occupational Exposure Limits,

ADDITIONAL INFORMATION



ICSC: 0872 DICROTOPHOS
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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