4-Aminobenzenesulfonic acid
Aniline-4-sulfonic acid
C6H7NO3S
Molecular mass: 173.2
ICSC # 0569
CAS # 121-57-3
RTECS # WP3895500
EC # 612-014-00-X
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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, water spray, foam, carbon dioxide.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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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.
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Protective gloves.
Protective clothing.
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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
or
eye protection in combination with breathing protection if powder.
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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.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Personal protection: P2 filter respirator for harmful particles.
Do NOT let this chemical enter the environment.
Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting.
Wash away remainder with plenty of water.
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Separated from
strong acids,
strong bases.
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Xi symbol
R: 36/38-43
S: 2-24-37
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Important Data
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Physical State; Appearance:
WHITE
POWDER
OR
WHITE
TO GREY CRYSTALS
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating around 290°C,
on burning
and
on contact with
strong acids
producing
toxic fumes
including
nitrogen oxides
and
sulfur oxides
.
Reacts
violently with
strong bases
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Occupational Exposure Limits:
TLV not established.
MAK not established.
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Routes of Exposure:
Inhalation Risk:
A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
.
The substance
is mildly irritating to
the skin
.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact may cause skin sensitization.
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Physical
Properties
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Melting point (decomposes): 288°C
Density: 1.49
g/cm3
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Solubility in water: poor
Octanol/water partition coefficient as log Pow: -0.9
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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At room temperature this substance is in the form of monohydrate. It becomes anhydrous around 100°C.
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ADDITIONAL INFORMATION
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ICSC: 0569
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SULFANILIC ACID
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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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