Oxalic acid
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CAS
144-62-7
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HOOCCOOH • 2H2O
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RTECS
RO2450000
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Synonyms & Trade Names
Ethanedioic acid, Oxalic acid (aqueous), Oxalic acid dihydrate
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: TWA 1 mg/m3 ST 2 mg/m3
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OSHA PEL†: TWA 1 mg/m3
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IDLH
500 mg/m3
See: 144627
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Conversion
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Physical Description
Colorless, odorless powder or granular solid. [Note: The anhydrous form (COOH)2 is an odorless, white solid.]
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MW: 126.1
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BP: Sublimes
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MLT: 215°F (Sublimes)
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Sol: 14%
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VP: <0.001 mmHg
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IP: ?
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Sp.Gr: 1.90
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Fl.P: ?
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UEL: ?
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LEL: ?
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Combustible Solid
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Incompatibilities & Reactivities
Strong oxidizers, silver compounds, strong alkalis, chlorites [Note: Gives off water of crystallization at 215°F and begins to sublime.]
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Measurement Methods
None available
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH/OSHA
Up to 25 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered air-purifying respirator with a high-efficiency particulate filter.£
Up to 50 mg/m3:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters.
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Up to 500 mg/m3:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin, mucous membrane; eye burns; localized pain, cyanosis; shock, collapse, convulsions; kidney damage
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Target Organs
Eyes, skin, respiratory system, kidneys
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See also: INTRODUCTION
See ICSC CARD: 0529 See MEDICAL TESTS: 0170
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