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144-62-7

Basic Information
CAS No.: 144-62-7
Name: Oxalic acid
Article Data: 1764
Cas Database
Molecular Structure:
Molecular Structure of 144-62-7 (Oxalic acid)
Formula: C2H2O4
Molecular Weight: 90.0355
Synonyms: Ethanedioic acid ,Oxalic Acid 99.6%;industry grade Oxalic acid;Oxalic acid, Ethanedioic acid, Dicarboxylic acid;Anhydrous oxalic acid;Oxaluria;Acido ossalico;Aquisal;Oxagel;Ethanedioic acid (9CI);EPA Pesticide Chemical Code 009601;Oxiric acid;Acide oxalique;Aktisal;Kyselina stavelova;Oxalic acid anhy.;Oxalic acid anhydrous;Oxalic Acid Dihydrate;
EINECS: 205-634-3
Density: 1.772 g/cm3
Melting Point: 189-191 °C
Boiling Point: 365.099 °C at 760 mmHg
Flash Point: 188.79 °C
Solubility: Water solubility: 90 g/L (20 °C)
Appearance: Odorless white solid
Hazard Symbols: HarmfulXn
Risk Codes: 21/22-63-34
Safety: 24/25-23-36/37/39-27-26
Transport Information: UN 3261 8/PG 3
PSA: 74.60000
LogP: -0.84440
Synthetic route
563-96-2

2,2-dihydroxyacetic acid

A

144-62-7

oxalic acid

B

298-12-4

Glyoxilic acid

Conditions
ConditionsYield
With oxygen; ethylenediamine; Flavin mononucleotide In water at 15℃; under 4350.3 Torr; for 77h; glycolate oxidase, Aspergillus niger catalase, pH 8-9;A 0.2%
B 99.8%
95-92-1

oxalic acid diethyl ester

144-62-7

oxalic acid

Conditions
ConditionsYield
With ion exchange resin D001 In water at 75℃; for 1.41667h; Autoclave; Sealed tube; Large scale;99.8%
With potassium hydroxide In methanol at 35℃; for 0.0833333h;96%
With sodium hydroxide In N,N-dimethyl-formamide for 0.25h; Ambient temperature; Yield given;
553-90-2

Dimethyl oxalate

144-62-7

oxalic acid

Conditions
ConditionsYield
With ion-exchange resin Indion-130 In water at 75℃; for 1.5h; Reagent/catalyst; Autoclave; Sealed tube; Large scale;99.6%
With sulfuric acid In methanol; water for 2h; Reflux;
79-14-1

glycolic Acid

A

144-62-7

oxalic acid

B

298-12-4

Glyoxilic acid

Conditions
ConditionsYield
With diazoacetic acid ethyl ester; oxygen; Flavin mononucleotide In water at 5℃; under 6205.8 Torr; for 1h; Pichia Pastoris transformant MSO10 (423 IU of glycolate oxidase and 869000 IU of catalase), pH 9.25;A 1.3%
B 98.7%
With oxygen; 3,3-dimethyldioxirane In acetone at 32℃; Kinetics; Further Variations:; Temperatures; Oxidation;
79-14-1

glycolic Acid

A

144-62-7

oxalic acid

B

CO2

CO2

Conditions
ConditionsYield
With oxygen In water at 249.9℃; under 37503 Torr; for 2h; Mechanism; Product distribution; various conc. NaOH solution,;A 96.7%
B n/a

[Cu2(m-xpt)2(μ-C2O4)](PF6)2

68-12-2, 33513-42-7

N,N-dimethyl-formamide

A

[Cu2(m-xpt)2(H2O)2](NO3)4*4DMF

B

144-62-7

oxalic acid

Conditions
ConditionsYield
Stage #1: [Cu2(m-xpt)2(μ-C2O4)](PF6)2 With nitric acid In methanol for 3h;
Stage #2: N,N-dimethyl-formamide In water
A 96%
B n/a

[Cu2(m-xpt)2(μ-C2O4)](PF6)2

68-12-2, 33513-42-7

N,N-dimethyl-formamide

A

[Cu2(m-xpt)2Cl2]Cl2*4DMF

B

144-62-7

oxalic acid

Conditions
ConditionsYield
Stage #1: [Cu2(m-xpt)2(μ-C2O4)](PF6)2 With hydrogenchloride In methanol for 3h;
Stage #2: N,N-dimethyl-formamide In water
A 94%
B n/a
2018-45-3

4-(β-hydroxyethyl)-4-methyl-1,3-dioxane

A

597-44-4

2-hydroxy-2-methylbutane-1,4-dioic acid

B

503-49-1

meglutol

C

144-62-7

oxalic acid

Conditions
ConditionsYield
With nitric acid 1. adding, 7 h; 50-60 deg C, 1 h;A 5%
B 90%
C 4%
107-21-1

ethylene glycol

144-62-7

oxalic acid

Conditions
ConditionsYield
With nitric acid In water at 20℃; for 240h;85%
With oxygen In acetonitrile at 20℃; for 24h; Catalytic behavior;55%
With alkaline permanganate at 50℃;
502-67-0

Farnesal

A

144-62-7

oxalic acid

B

levulinic acid

levulinic acid

C

67-64-1

acetone

Conditions
ConditionsYield
With ozoneA 10%
B 55%
C 80%
Raw Materials
6153-56-6
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    Product Name: Oxalic acid CAS: 144-62-7 MF: C2H2O4 MW: 90.03 EINECS: 205-634-3 Mol File: 144-62-7.mol Oxalic acid Structure Oxalic acid Chemical Properties Melting point 189.5 °C (dec.)(lit.) Boiling point 365.1°C

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Chemistry

Molecular Formula: H2C2O4
Molecular Weight: 90.03 g/mol
EINECS: 205-634-3
Density: 1.9 g/mL
Flashing point: 101-157 °C
Melting point: 189-191 °C
Water solubility: 90 g/L (20 °C)
Appearance: Odorless white solid
Structure of Oxalic acid (CAS NO.144-62-7):
                                 
IUPAC Name: Oxalic acid
Product Category of Oxalic acid (CAS NO.144-62-7): Intermediates;Water Ttreatment Chemicals;Alphabetic;Carbonyl Compounds;Carboxylic Acids;Complexometric Solutions

Uses

 Oxalic acid (CAS NO.144-62-7) is used as Bar Keeper's Friend, Zud, some bleaches, and rustproofing treatments, and it is also used as an cadditive to automotive wheel leaners. It is used in platinotype, the early photographic Platinum/Palladium printing process. Oxalic acid is used as a rust remover in such applications as automotive shops and for the restoration of antiques, and as a recommended surface pretreatment for stainless steels (surface etch) before application of solid metal or polymer self-lubricating coatings. It is used for polishing stones and marble, and used in the acid treatment for destroying warts.

Toxicity Data With Reference

1.    

skn-rbt 500 mg/24H MLD

    85JCAE    Prehled Prumyslove Toxikologie; Organicke Latky Marhold, J.,Prague, Czechoslovakia.: Avicenum,1986,311.
2.    

eye-rbt 250 μg/24H SEV

    85JCAE    Prehled Prumyslove Toxikologie; Organicke Latky Marhold, J.,Prague, Czechoslovakia.: Avicenum,1986,311.
3.    

eye-rbt 100 mg/4S rns SEV

    FCTOD7    Food and Chemical Toxicology. 20 (1982),573.
4.    

ipr-mus LD50:270 mg/kg

    TXCYAC    Toxicology. 62 (1990),203.
5.    

orl-rat LD50:7500 mg/kg

    TXAPA9    Toxicology and Applied Pharmacology. 42 (1977),417.
6.    

scu-cat LDLo:112 mg/kg

    HBAMAK    Abdernaldens Handbuch der Biologischen Arbeitsmethoden. 4 (1935),1377.
7.    

scu-frg LDLo:757 mg/kg

    HBAMAK    Abdernaldens Handbuch der Biologischen Arbeitsmethoden. 4 (1935),1377.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Poison by subcutaneous route. Moderately toxic by ingestion. A skin and severe eye irritant. Acute oxalic poisoning results from ingestion of a solution of the acid. There is marked corrosion of the mouth, esophagus, and stomach, with symptoms of vomiting, burning abdominal pain, collapse, and sometimes convulsions. Death may follow quickly. The systemic effects are attributed to the removal by the oxalic acid of the calcium in the blood. The renal tubules become obstructed by the insoluble calcium oxalate, and there is profound kidney disturbance. The chief effects of inhalation of the dusts or vapor are severe irritation of the eyes and upper respiratory tract, gastrointestinal disturbances, albuminuria, gradual loss of weight, increasing weakness and nervous system complaints, ulceration of the mucous membranes of the nose and throat, epistaxis, headache, irritation, and nervousness. Oxalic acid has a caustic action on the skin and may cause dermatitis; a case of early gangrene of the fingers resembling that caused by phenol has been described. More severe cases may show albuminuria, chronic cough, vomiting, pain in the back, and gradual emaciation and weakness. The skin lesions are characterized by cracking and fissuring of the skin and the development of slow-healing ulcers. The skin may be bluish in color, and the nails brittle and yellow. Violent reaction with furfuryl alcohol, Ag, NaClO3, NaOCl. When heated to decomposition it emits acrid smoke and irritating fumes. See also OXALATES.
Hazard Codes: HarmfulXn
Risk Statements: 21/22-63-34 
R21/22:Harmful in contact with skin and if swallowed. 
R34:Causes burns. 
R63:Possible risk of harm to the unborn child.
Safety Statements: 24/25-23-36/37/39-27-26 
S23:Do not breathe vapour. 
S24/25:Avoid contact with skin and eyes. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S27:Take off immediately all contaminated clothing. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.

Specification

 Oxalic acid , its cas register number is 144-62-7. It also can be called Ethanedionic acid ; and Oxalic acid anhydrous . It is hazardous, so the first aid measures and others should be known. Such as: When on the skin: first, should flush skin with plenty of water immediately for at least 15 minutes while removing contaminated clothing. Secondly, get medical aid. Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Then get medical aid soon. While, it's inhaled: Remove from exposure and move to fresh air immediately. Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product: If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Notes to physician: Treat supportively and symptomatically.
In addition, Oxalic acid (CAS NO.144-62-7) absorbs moisture or water from the air. It is not compatible with Metals, strong oxidizing agents, strong bases, acid chlorides, sodium hypochlorite, steel, mercury, silver, sodium chloride, chlorites, and you must not take it with incompatible materials. And also prevent it to broken down into hazardous decomposition products: formic acid, carbon monoxide, carbon dioxide.