L-Asparagic acid
(S)-Aminobutanedioic acid
L-Aminosuccinic acid
C4H7NO4
Molecular mass: 133.1
ICSC # 1439
CAS # 56-84-8
RTECS # CI9098500
Ló, October 2001 (not reviewed); postponed in Montreal 2002 for more primary biological references.
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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.
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NO open flames.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Finely dispersed particles form explosive mixtures in air.
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Prevent build-up of electrostatic charges (e.g., by grounding).
Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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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 spectacles.
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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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Bitter taste.
Burning sensation in the throat and chest.
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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.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Wash away remainder with plenty of water.
(Extra personal protection: P1 filter respirator for inert particles.)
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Separated from
strong oxidants.
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Important Data
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Physical State; Appearance:
COLOURLESS
CRYSTALS
Physical Dangers:
Dust explosion possible if in powder or granular form, mixed with air.
If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc.
Chemical Dangers:
The substance decomposes
on burning
producing
toxic gases
including
nitrogen oxides
.
Reacts violently with oxidants.
Occupational Exposure Limits:
TLV not established.
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Routes of Exposure:
The substance can be absorbed into the body
by ingestion.
Inhalation Risk:
Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly when dispersed, especially, if powdered.
Effects of Short-Term Exposure:
The substance
is irritating to
the eyes
and
the respiratory tract
.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Decomposes below boiling point at 324°C
Melting point: 270°C
Density: 1.7
g/cm3
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Solubility in water, g/100 ml: 0.45
Octanol/water partition coefficient as log Pow: -3.89
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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: 1439
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L-ASPARTIC 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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