Oxalic Acid: Material Safety Data Sheet
Section 1 :Product and Company Identification
Product Name Oxalic Acid
Chemical Family Organic Acid
Chemical Name Oxalic Acid Dihydrate
Synonym(s) Ethanedoic Acid Dihydrate
CAS Number 6153-56-6
Formula (COOH)2.2H2O
Manufacturer / Supplier Radiant Agro Chem Pvt. Ltd.,
Data F-15 MIDC Industrial Area,
Chikalthana, Aurangabad(MS)
India ?431210
Telephone +91-240-2482450 / 2482950
Fax +91-240-2485450
Section 2: Composition/Information on Ingredients
CAS Number EINECS Number Chemical Name % by weight
144-62-7 205-634-3 Oxalic Acid, anhydrous -
6153-56-6 Unlisted Oxalic Acid Dihydrate 99.5-100
Section 3 : Hazards Identification
Emergency Overview: Danger! May be fatal if swallowed. Corrosive. Causes severe irritation and
burns to the skin, eyes and respiratory tract. Harmful if inhaled or absorbed
with skin. May cause kidney damage.
Potential Health Effects
Routes of Entry: Inhalation, Ingestion, Eye Contact and Skin Contact
Target Organs: Eyes, Skin, Respiratory System and Kidneys
Skin Contact: Skin contact may cause irritation with symptoms of redness, swelling, itching
and pain.
Eye Contact: Eye contact may cause irritation with symptoms of redness, swelling, itching
and pain. May cause Corneal injury.
Inhalation: Inhalation of Oxalic Acid produces irritation of respiratory tract, cough and
vomiting.
Ingestion: Oxalic Acid is toxic. As little as 5 gms may be fatal. Ingestion may cause
Gastroenteritis, burns, nausea, vomiting, shock and convulsions. Oxalic Acid
removes Calcium from the blood as Calcium Oxalate. Calcium Oxalate thus
formed might precipitate in the kidney tubules.
Chronic Exposure: Inhalation of Oxalic Acid over a long period of time may cause inflammation
of respiratory tract and might result in weight loss. It may also result in
Urolithiasis (the formation of urinary stones).
Explanation of None.
Carcinogenicity:
Medical conditions Persons with preexisting eyes or skin conditions or impaired pulmonary
aggravated by exposure: function may be more susceptible to the effects of this product.
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Section 4: First Aid Measures
Eyes: Incase of contact, immediately flush eyes with plenty of water for atleast 15
minutes. Get medical aid immediately.
Skin: Incase of contact, immediately flush skin with plenty of water for atleast 15
minutes while removing contaminated clothing and shoes. Get medical aid
immediately. Wash clothing before reuse.
Ingestion: If swallowed, do NOT induce vomiting. If conscious give water, milk or Milk of
Magnesia. Never give anything by mouth to an unconscious person. Call a
Doctor immediately.
Inhalation: If inhaled, remove to fresh air. If not breathing give artificial respiration. If
breathing is difficult give Oxygen. Get medical aid immediately.
Section 5: Fire Fighting Measures
Auto Ignition N/A
Temperature
Flash Point N/A
Explosion Limits N/A
Unusual Fire and Oxalic Acid is combustible below 101癈 (215 癋). Decomposition products
Explosion Hazards include carbon monoxide and formic acid which are toxic and flammable. Reacts
explosively with strong oxidizing materials and some silver compounds.
Extinguishing Media Use water spray, dry chemical, Carbon Di Oxide or alcohol foam. Foam or water
on molten Oxalic Acid may cause frothing.
NFPA Rating Health: 3; Flammability: 1; Reactivity: 0
Special Information Fire fighters should wear a full protective gear, with a self-contained breathing
apparatus with full face piece operated in positive pressure mode. Move
containers from fire area if it can be done without risk. Use water to keep fire-
exposed containers cool.
Section 6: Accidental Release Measures
General Information: Remove all sources of ignition. Ventilate area of leak or spill. Utilize recommended
protective clothing and equipment as specified in section 8.
Spills: Clean the spill in a manner that does not disperse dust into the air. Use non-sparking tools and
equipment. Pick up spill for recovery or disposal and place in closed container. Spill area can be washed
with water. Collect wash water for approved disposal. Water disposal should be in accordance with existing
federal, state and local environmental regulations.
Section 7: Handling and Storage
Handling: Wash thoroughly after handling. Do not ingest or inhale. Do not get in eyes, on
skin or on clothing. Minimize dust generation and accumulation.
Storage: Store in a cool, dry and well-ventilated area away from heat and incompatible
substances (refer section 10). Keep container tightly closed.
Section 8: Exposure Controls /Personal Protection
Engineering Controls:
Facilities storing or utilizing the material should be equipped with an eyewash facility and a safety shower.
Use adequate general or local exhaust ventilation to keep airborne concentration below the permissible
limits.
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Exposure Limits:
Chemical Name OSHA NIOSH ACIGH
3 3
1mg/m3 TLV-TWA
Oxalic Acid, anhydrous 1mg/m TWA 1mg/m TLV-TWA
2mg/m3 STEL 2mg/m3 TLV-STEL
2mg/m3 TLV-STEL
500mg/m3 IDLH (NOISH)
Oxalic Acid Dihydrate Not Listed Not Listed Not Listed
Personal Protective Equipment:
Use chemical safety goggles or eyeglasses. A face shield may also be necessary.
Eyes:
Maintain eye was fountain and safety showers in the immediate work area.
Wear impervious protective clothing including apron, boots and rubber gloves as
Skin:
appropriate.
Use local ventilation if dusting is a problem, to maintain air levels below the
Ventilation:
recommended exposure limit.
Approved respirators should be used if airborne concentration exceeds
recommended limit. For emergencies or instances where the exposure levels are
Personal respirators: not known, use a full-face piece positive-pressure, air supplied respirator.
WARNING: Air-purifying respirators do not protect workers in oxygen-deficient
atmospheres.
Section 9: Physical and Chemical Properties
Physical State Solid
Appearance White crystalline powder
Odor Odorless
Molecular Formula (COOH)2.2H2O
Molecular Weight 126.07 (dihydrate)
90.03 (anhydrous)
pH 1.3 (0.1M solution in water)
Vapor pressure Less than 0.001 mm Hg @ 20癈 (68癋)
Vapor Density 4.4 (Air = 1)
Boiling Point 149-160癈 (300-320癋)
Melting Point 101.5癈 (215癋)
Sublimation Point 157 癈
Decomposition Temperature 189.5 癈
Solubility in water 14.3 g / 100 ml (25癈)
Solubility in Ethanol 23.7 g / 100 ml (15 癈)
Solubility in Diethyl Ether 1.37 g / 100 ml (15 癈)
1.90 g/cm3 (anhydrous)
Specific gravity
1.653 g/cm3 (dihydrate)
(Water = 1)
Acidity Strong Acid
Dissociation constant (pKa) pK1 = 1.23, pK2 = 4.19 (25 癈)
Crystal Structure Rhombic (anhydrous), Monoclinic (dihydrate)
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Section 10: Stability and Reactivity
Stability: Stable under ordinary conditions of use and storage.
Strong oxidizing agents (such as perchlorates, peroxides, permanganates,
chlorates, nitrates, chlorine, bromine and fluorine); hypochlorite, Sliver and its
Incompatibilities:
compounds, strong alkalis, chlorites and furfuryl alcohol ?since violent reactions
occur.
Conditions to avoid: Heat, ignition sources and incompatibilities.
Hazardous
Carbon monoxide, Carbon dioxide, formic acid, acrid smoke and fumes.
Decomposition
Products:
Hazardous
Has not been reported.
Polymerisation:
Section 11: Toxilogical Information
CAS Number RTECS Number
144-62-7 R02450000
6153-56-6 Unlisted
SKIN AND EYE IRRITATION DATA:
Route/Organism Dose Effect
Skin-Rabbit 500 mg/24 hour Mild
Eye-Rabbit 250 礸/24 hour Severe
Eye-Rabbit 100 mg/4S rinse Severe
ACUTE TOXICITY DATA:
Route/Organism Dose Effect
Intraperitoneal-Mouse lethal dose (50 percent kill): 270 mg/kg N/R
Oral-Dog lowest published lethal dose: 1 gm/kg N/R
Oral-Rat lethal dose (50 percent kill):7500mg/kg N/R
Gastrointestinal: Changes in structure
or function of esophagus
Oral-Woman lowest published lethal dose: 600 mg/kg Gastrointestinal: Hypermotility,
diarrhea
Gastrointestinal: Other changes
Subcutaneous-Cat lowest published lethal dose:112 mg/kg N/R
Subscutaneous-Frog lowest published lethal dose:757 mg/kg N/R
Unreported route-Rat lethal dose (50 percent kill):1400 mg/kg N/R
Only selected data from Registry of Toxic Effects of Chemical Substances (RTECS #: RO2450000) is
presented here. See actual entry for complete information.
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CARCINOGENICITY:
Oxalic Acid, anhydrous Not Listed by ACGIH, IARC, NIOSH, NTP or OSHA.
Oxalic Acid Dihydrate Not Listed by ACGIH, IARC, NIOSH, NTP or OSHA.
Section 12: Ecological Information
Environmental Fate:
Biodegradation Readily Biodegradable
BOD5 0.16 mg/l
COD 0.18 mg/l
BOD5/COD ratio 0.89
BCF 0.6
Bio-Accumulation Non bio-accumulable
Ecotoxicity:
LC50 4000 mg/L, 24 hours, Fish (Bluegill), 1000 ppm, 0.5 hours, Fish (Gold
Fish), 100 ppm, 0.3 hours, Fish (Trout)
5330 mg/L, 96 hours, Amphibian(Clawed Toad)
EC50 136.9 mg/L, 48 hours, Crustaceans(Water Flea)
1500 mg/L, 24 hours, Algae
Section 13: Disposal Considerations
Disposal should be done in accordance with local, state and federal regulations.
Section 14: Transport Information
US DOT IMO
Proper Shipping Corrosive, Solid, Acidic, Organic Corrosive, Solid, Acidic, Organic N.O.S.
Name N.O.S. (Oxalic Acid, Dihydrate) (Oxalic Acid, Dihydrate)
UN Number 3261 3261
Hazard Class 8 8
Packing Group III III
Section 15: Regulatory Information
Classification and labeling information in accordance with EC directives
Classification Xn; R21/22
Hazard Symbol
Xn: Harmful
Risk Phrases R21/22 Harmful in contact with skin and if swallowed
Safety Phrases S2 Keep out of reach of children
S24/25 Avoid contact with skin and eyes
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Section 16: Other Information
References:
IUCLID Chemical Data Sheet - ESIS
Chemical Toxicity studies on Aquatic Organisms in PAN pesticides database
Chemical profiles created by Canadian centre for occupational health and safety
MSDS available on the internet
Legend:
CAS Chemical Abstract Service
EINECS European Inventory of Existing Commercial Chemical substance
NFPA National Fire Protection Association (USA)
OSHA Occupational Safety & Health Administration (USA)
NIOSH National Institute for Occupational Safety & Health (USA)
IUCLID International Uniform Chemical Information Database
ESIS European chemical Substances Information System
ACIGH American Conference of Governmental Industrial Hygienists
IARC International Agency for Research on Cancer
RTECS Registry of Toxic Effects of Chemical Substances
NTP National Toxicology Program (USA)
PAN Pesticide Action Network (USA)
US DOT US Department of Transportation
IMO International Maritime Organisation
TLV ?TWA Threshold Limit Value ?Time Weighted Average (ACIGH)
TVL - STEL Threshold Limit Value ?Short Term Exposure Limit (ACIGH)
IDLH Immediately Dangerous to life and health concentration value (NOISH)
LD50 Lethal Dosage causing death in 50%
LC50 Lethal concentration causing death in 50%
EC50 Median Effective Concentration (required to induce 50% effect)
BCF Bio-concentration Factor
Disclaimer:
The information contained in this Material Safety Data Sheet is believed to be accurate and represents
the best information currently available to Radiant Agro Chem Pvt. Ltd. However, Radiant Agro Chem Pvt.
Ltd. makes no representation or warranty of merchantability or any other warranty, express or implied, in
respect to the comprehensiveness or adequacy of this document for any particular use and shall assume no
liability resulting from its use. Users should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be liable for any claims, losses or
damages of any third party or for lost profits or exemplary damages, howsoever arising, even if the company
has been advised of the possibility of such damages.
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