textfiles/science/CHEMICALS/calcium_oxalate.txt

MSDS - CALCIUM OXALATE

SECTION I.  IDENTIFICATION

    -    Chemical Name:  Calcium Oxalate
    -    Synonym(s):  Ethanedioic Acid Calcium Salt
    -    Formula:  C2CaO4.H2O
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SECTION II.  PRODUCT AND COMPONENT HAZARD DATA

    A.                  Weight
         COMPONENT(S):  Percent    TLV(R)      Accession No.   CAS Reg. No.

         Calcium Oxalate GT 98     ---           435753          5794-28-5

    B.   PRECAUTIONARY LABEL STATEMENT(S):

              LOW HEALTH HAZARD FOR USUAL INDUSTRIAL HANDLING
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SECTION III.  PHYSICAL DATA

    -    Appearance and Odor:  Colorless crystals; odorless
    -    Melting Point:  200 C (392 F)
    -    Vapor Pressure:  Negligible
    -    Evaporation Rate (n-butyl acetate = 1):  Negligible
    -    Vapor Density (Air = 1):  Not Applicable
    -    Volatile Fraction by Weight:  Negligible
    -    Specific Gravity (H2O = 1):  2.2
    -    Solubility in Water (by Weight):  Negligible
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SECTION IV.  FIRE AND EXPLOSION HAZARD DATA

    -    Extinguishing Media:  Water spray; Dry chemical; CO2
    -    Special Fire Fighting Procedures:  None known
    -    Unusual Fire and Explosion Hazards:  None known
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SECTION V.  REACTIVITY DATA

    -    Stability:  Stable
    -    Incompatibility:  Strong oxidizers
    -    Hazardous Decomposition Products:
              As with any other organic material, combustion will produce
              carbon dioxide and probably carbon monoxide.
    -    Hazardous Polymerization:  Will not occur.
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SECTION VI.  TOXICITY AND HEALTH HAZARD DATA

    A.   EXPOSURE LIMITS:  Not established

    B.   EXPOSURE EFFECTS:

              Inhalation: Low hazard for usual industrial handling.

                   Eyes:  No specific hazard known.
                          However, any material that contacts the eye may be
                          irritating.

                   Skin:  Low hazard for usual industrial handling.

    C.   FIRST AID:

                   Eyes:  Immediately flush eyes with plenty of water.

                   Skin:  Flush skin with plenty of water.

    D.   TOXICITY DATA

         Eye Irritation:  Calcium oxalate is a very inert insoluble solid
         having no injurious effect on contact with the eye.(1)

         Other:  The mean lethal oral dose for an adult is felt to be from 15
         - 30 g, with death resulting from acute kidney failure within a few
         hours.(2)
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SECTION VII.  VENTILATION AND PERSONAL PROTECTION

    A.   VENTILATION:

              Good general ventilation should be sufficient.

    B.   SKIN AND EYE PROTECTION:

              Safety glasses should be worn in any type of industrial
              chemical handling.
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SECTION VIII.  SPECIAL STORAGE AND HANDLING PRECAUTIONS

              Keep from contact with oxidizing materials.
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SECTION IX.  SPILL, LEAK, AND DISPOSAL PROCEDURES

              Sweep material onto paper and place in fiber carton.
              Package appropriately for safe feed to an incinerator or
              dissolve in compatible waste solvents prior to incineration.
              Dispose by incineration or contract with licensed chemical
              waste disposal agency.
              Discharge, treatment, or disposal may be subject to federal,
              state, or local laws.
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SECTION X.    ENVIRONMENTAL EFFECTS DATA

    A.   SUMMARY:
              This chemical has not been tested for environmental effects.
              Some published data are available for oxalic acid and oxalate
              anion, and these data have been used to provide the following
              estimate of environmental impact:

              This chemical has a moderate biological oxygen demand and it
              may cause oxygen depletion in aquatic systems.  It is expected
              to have a low potential to affect aquatic organisms.  The
              organic portion of this chemical is readily biodegradable and
              is not likely to bioconcentrate.  When diluted with water, this
              chemical released directly or indirectly into the environment
              is not expected to have a significant impact.

              Calcium oxalate is practically insoluble in water and acetic
              acid.6,7  The data below are for oxalic acid and/or sodium
              oxalate.
    B.   OXYGEN DEMAND DATA: (Oxalic acid)(3)
              ThOD:   1.8 g/g
              COD:    0.18 g/g
              BOD5:   0.14 g/g
              BOD20:  0.16 g/g
    C.   ACUTE AQUATIC EFFECTS:
              Goldfish; Period of survival:  0.4 - 0.5 hr, 1000 ppm (pH 2.6);
              4 days, 200 ppm (pH 5.3)(3)
              96-hour LC50; Mosquito Fish:  1350 mg/L (Sodium oxalate)(5)
              96-hour LCo; Water flea:  95 mg/L (Oxalic acid)(4)
              48-hour Immobilization; Water Flea:  214 mg/L (sodium oxalate)
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SECTION XII.  REFERENCES

        1.    Grant, W. M. Toxicology of the Eye, Charles C. Thomas, Publ.
              Springfield, Ill. 974.

        2.    Gosselin, R. E., et. al., Clinical Toxicology of Commercial
              Products, 4th, 1976.

        3.    Verschueren, K., Handbook of Environmental Data on Organic
              Chemicals, Second Edition, Van Nostrand Reinhold Company, New
              York, N.Y., 1983.

        4.    Battelle's Columbus Laboratories, Water Quality Critical Data
              Book - Vol. 3 - Effects of Chemicals on Aquatic Life - Selected
              Data from the Literature Through 1968, for the U.S.
              Environmental Protection Agency, Project No. 18050 GWV,
              Contract No. 68-01-0007, May 1971.

        5.    McKee, J.E. and Wolf, H.W., Eds., "Water Quality Criteria,"
              State of California, Publication No. 3-A, 1963.

        6.    Weast, R.C. "Handbook of Chemistry and Physics", CRC Press Ed.
              CRC Handbook, Boca Raton, FL, 1981-2.

        7.    Windholz, M. "The Merck Index - Ninth Edition" Merck and Co.,
              Ruhway NJ, 1976.