Tri-n-butyl phosphate
Phosphoric acid, tributyl ester
C12H27O4P / (C4H9)3PO4
Molecular mass: 266.3
ICSC # 0584
CAS # 126-73-8
RTECS # TC7700000
EC # 015-014-00-2
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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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Water spray, foam, powder, 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.
Nausea.
Sore throat.
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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 skin with plenty of water or shower.
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•Eyes
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Redness.
Pain.
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Safety goggles
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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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Do not eat, drink, or smoke during work.
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Rinse mouth.
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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Personal protection:
filter respirator for organic gases and vapours.
Do NOT let this chemical enter the environment.
Collect leaking liquid in sealable containers.
Do not use plastic containers.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
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Store in an area without drain or sewer access.
Separated from
bases
and
strong oxidants.
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Xn symbol
R: 22-38-40
S: 2-36/37-46
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Important Data
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Physical State; Appearance:
COLOURLESS
ODOURLESS
VISCOUS LIQUID
Physical Dangers:
Chemical Dangers:
The substance decomposes
on burning
producing
toxic fumes
including
phosphorus oxides
.
Reacts with warm water producing corrosive phosphoric acid and butanol.
Attacks some forms of plastic, rubberandcoatings.
Reacts
with
bases
and
strong oxidants
.
Occupational Exposure Limits:
TLV: 0.2 ppm as TWA; BEI issued; (ACGIH 2005).
MAK: 1 ppm
as TWA;
skin absorption (H);
Peak limitation category: II(4); Carcinogen category: 4; Pregnancy risk group: C;
(DFG 2005).
OSHA PEL: TWA 5 mg/m3
NIOSH REL: TWA 0.2 ppm (2.5 mg/m3)
NIOSH IDLH: 30 ppm See: 126738
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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 20°C
; on spraying or dispersing, however, much faster.
Effects of Short-Term Exposure:
The substance
is severely irritating to
the eyes
,
the skin
and
the respiratory tract
.
Effects of Long-Term or Repeated Exposure:
When ingested
the substance may have effects on the
bladder
, resulting in
tissue lesions
.
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Physical
Properties
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Boiling point (decomposes): 289°C
Melting point: <-80°C
Relative density (water = 1): 0.98
Solubility in water:
poor
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Vapour pressure, Pa at 25°C: 0.15
Relative vapour density (air = 1): 9.2
Flash point: 146°C o.c.
Auto-ignition temperature: >482°C
Octanol/water partition coefficient as log Pow: 4.0
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Environmental
Data
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The substance is toxic to aquatic organisms.
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N O T E S
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ADDITIONAL INFORMATION
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ICSC: 0584
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TRIBUTYL 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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