Dibutyl acid o-phosphate
Dibutyl hydrogen phosphate
Phosphoric acid dibutyl ester
(CH3(CH2)3)2HPO4 / C8H19PO4
Molecular mass: 210.2
ICSC # 1278
CAS # 107-66-4
RTECS # TB9605000
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
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Powder, AFFF, foam, carbon dioxide.
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Explosion
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Exposure
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PREVENT GENERATION OF MISTS!
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•Inhalation
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Cough.
Headache.
Sore throat.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
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•Skin
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Redness.
Pain.
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Protective gloves.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety goggles,
face shield.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Burning sensation.
Sore throat.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Do NOT induce vomiting.
Give plenty of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Collect leaking liquid in sealable containers.
Cautiously neutralize spilled liquid.
Then wash away with plenty of water.
Personal protection:
filter respirator for organic gases and vapours.
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Separated from
strong oxidants,
strong bases.
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating
or
on burning
producing toxic and corrosive fumes including phosphoric acid.
The substance is a medium strong acid.
Reacts with strong oxidants.
Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001).
Occupational Exposure Limits:
TLV: 1 ppm as TWA; 2 ppm as STEL; (ACGIH 2004).
OSHA PEL: TWA 1 ppm (5 mg/m3)
NIOSH REL: TWA 1 ppm (5 mg/m3) ST 2 ppm (10 mg/m3)
NIOSH IDLH: 30 ppm See: 107664
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol.
Inhalation Risk:
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
,
the skin
and
the respiratory tract
.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 135-138°C
Melting point: -13°C
Relative density (water = 1): 1.06
Solubility in water, g/100 ml at 20°C: 1.8
Vapour pressure, kPa at 20°C: 0.13
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Relative vapour density (air = 1): 7.2
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: 188°C o.c.
Auto-ignition temperature: 420°C
Octanol/water partition coefficient as log Pow: 0.6-1.4
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Environmental
Data
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N O T E S
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ADDITIONAL INFORMATION
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ICSC: 1278
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DIBUTYL PHOSPHATE
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(C) IPCS, CEC, 1994
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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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