International Chemical Safety Cards

OXALIC ACID DIHYDRATE ICSC: 0707
OXALIC ACID DIHYDRATE
Ethanedioic acid dihydrate
Dicarbolic acid dihydrate
C2H2O4.H2O/HOOCCOOH.2H2O
Molecular mass: 126.1
CAS # 6153-56-6
RTECS # RO2450000
ICSC # 0707
EC # 607-006-00-8 (anhydrous)
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Combustible.
NO open flames.
Water spray, powder.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!

  • INHALATION
    		• Cough. Shortness of breath. Sore throat.
    		Local exhaust or breathing protection.
    		Fresh air, rest. Half-upright position. Refer for medical attention.
  • SKIN
    		• MAY BE ABSORBED! Dry skin. Redness. Skin burns. Pain. Blisters.
    		Protective gloves. Protective clothing.
    		Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
  • EYES
    		• Redness. Pain. Severe deep burns.
    		Face shield.
    		First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
  • INGESTION
    		• Abdominal cramps. Sore throat. Vomiting. Weakness. Convulsions.
    		Do not eat, drink, or smoke during work.
    		Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.
    SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Sweep spilled substance into containers. Wash away remainder with plenty of water (extra personal protection: P2 filter respirator for harmful particles).
    		Separated from strong oxidants, strong bases.

    Xn symbol
    R: 21/22
    S: 2-24/25
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 0707 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

    International Chemical Safety Cards

    OXALIC ACID DIHYDRATE ICSC: 0707

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    PHYSICAL STATE; APPEARANCE:
     COLOURLESS CRYSTALS.

    PHYSICAL DANGERS:

    CHEMICAL DANGERS:
     The substance decomposes on rapid heating above about 150°C producing toxic gas. The solution in water is a medium strong acid which reacts violently with strong bases. Reacts violently with oxidants causing fire and explosion hazard. Reacts with silver, forming explosive products.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
     TLV: ppm; 1 mg/m3 (ACGIH 1989).
    PDK not established.


    		ROUTES OF EXPOSURE:
     The substance can be absorbed into the body by inhalation of its aerosol, 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 dispersing however much faster. Heating may lead to harmful concentration.

    EFFECTS OF SHORT-TERM EXPOSURE:
     The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of the varpour may cause lung oedema (see Notes). Exposure at high concentration could cause shock and convulsions. In these cases kidney damage may occur. Medical observation is indicated.

    EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
     The substance may have effects on the kidneys , resulting in kidney stones.
    PHYSICAL
    PROPERTIES
    Sublimation point: see Notes°C
    Melting point: 102°C
    Relative density (water = 1): 1.7
    Solubility in water, g/100 ml: 10
    		 Vapour pressure, Pa at 30°C: see Notes
    Relative vapour density (air = 1): 3.1
    Octanol/water partition coefficient as log Pow: -0.43/-0.81
    ENVIRONMENTAL
    DATA
    NOTES
    The apparent melting point caused by loss of crystal water is given. The water-free substance anhydrous oxalic acid has a sublimation point of 157°C, while melting takes place at 187°C (under decomposition) after rapid heating. The vapour pressure of anhydrous oxalic acid amounts 0.04 Pa at 30°C. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Immediate administration of an appropriate spray, by a doctor or a person authorized by him/her, should be considered. The recommendations on this Card also apply to anhydrous oxalic acid.
    ADDITIONAL INFORMATION


    ICSC: 0707 OXALIC ACID DIHYDRATE
    © IPCS, CEC, 1993
    IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of 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.