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Oxalic acid 99.5% Colorless transparent crystal

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CAS No.:

144-62-7

Grade:

Industrial Grade

Content:

99.5%

Port:

Port of Qingdao

Packaging:

25kg/bag

Price valid (until):

2023-04-20

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Shandong Lingnuo chemical Co., Ltd

Company Type:

Trader

Location:

China

Qualification:

Main Products:

Melamine,ethyl acetate,maleic anhydride,acetic acid,tetrahydrofuran,butyl acetate

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Product Description
Seller Information
Inquiry History

Description

Oxalic acid

Oxalic acid is an organic substance. Chemical form H₂C₂O₄. It is a metabolic product of living organisms. Binary weak acid. It is widely distributed in plant, animal, and fungal bodies, and performs various functions in different living organisms. Studies have found that more than 100 kinds of plants are rich in oxalic acid, especially spinach, amaranth, beet, purslane, taro, sweet potato, rhubarb and other plants have the highest content. Because oxalic acid can reduce the bioavailability of mineral elements, it is easy to form calcium oxalate with calcium ions in human body and lead to kidney stones, so oxalic acid is often considered as an antagonist for the absorption and utilization of mineral elements. Its anhydride is carbon trioxide.

Colorless transparent crystal, often containing two molecules of crystalline water. When heated to 98 ~ 100℃, oxalate hydrate lost its crystalline water. Anhydrous oxalic acid is a clear, odourless solid with delixability. It has two crystal forms: rhomboidal and monoclinic. At room temperature, rhombic oxalate crystals are thermodynamically stable, while monoclinic oxalate crystals are thermodynamically metastable. Rhombic oxalic acid crystals have slightly higher melting points and densities than monoclinic oxalic acid crystals. Anhydrous oxalic acid melting point 189.5℃ (decomposition). Partial decomposition begins at 157℃ I When accelerated heating, oxalic acid is completely decomposed to form formic acid, carbon monoxide and water. Soluble in water and alcohol, slightly soluble in ether, insoluble in benzene, chloroform and petroleum ether. Risk of ignition in contact with high heat, open flame or oxidant. Decomposition by heating produces toxic gases.

The two carboxyl groups in oxalic acid molecule are directly connected, which has some special properties. For example, oxalic acid is reductive, which can reduce potassium permanganate to manganese divalent. This reaction is used as a method to determine the concentration of potassium permanganate in quantitative analysis. Oxalic acid can also be used as a bleaching agent for fibers, oils and tanning industries, also taking advantage of its reducing properties.

Oxalic acid is heated and decarboxylated to produce carbon dioxide, carbon monoxide and water. Carbon monoxide gas can be produced by thermal decomposition of oxalic acid in laboratory.

Oxalic acid forms water-soluble complexes with many metals. Oxalic acid can be used as rust, ink stain cleaning agent and metal polishing agent. Oxalic acid can remove rust. Go to a chemical store and buy a bottle of oxalic acid. Take some and rub it over the rust stains with a solution of warm water. Sell oxalic acid shop, generally sell some medical equipment, glass instruments.

Antimony oxalate is used as a mordant and ammonium ferric oxalate is used as a blueprint agent.

Mainly used as reducing agent and bleach, dyeing industry mordant, also used for refining rare metals, synthesis of various oxalate ester, oxalate and oxalyl ammonium.

Items	Specifications
English alias	BETZ 0295 Kleesαure Oxalic acid ETHANEDIOIC ACID DI-CARBOXYLIC ACID Kyselina stavelova DICARBOXYLIC ACID C2 PH STANDARD SOLUTION OXALATE BUFFER OXALATE ION CHROMATOGRAPHY STANDARD
CAS	144-62-7
chemical formula	C2H2O4
molecular weight	90.03
density	0.99 g/mL at 25 °C
melting point	α type, 189.5℃, β type: 182℃
boiling point	150℃ (sublimation)
flash(ing) point	188.8°C
functional group	-COOH
Ionic components in solution	C2O42- (oxalate ion), H+ (hydrogen ion), HC2O4- (hydrogen oxalate ion)
character	Colorless transparent crystal or powder, its crystal structure has two forms, namely α-type (rhombus) and β-type (monoclinic crystal), odorless, sour taste
refractive index	1.540
stability	Decomposition at 189.5℃
chemical property	Oxalic acid, also known as glycolic acid, is widely found in plant foods. Oxalic acid is a colorless columnar crystal, soluble in water rather than in organic solvents such as ether, Oxalate has a strong coordination effect and is another kind of metal chelating agent in plant food. When oxalic acid is combined with some alkaline earth metal elements, its solubility is greatly reduced, such as calcium oxalate is almost insoluble in water. Therefore, the presence of oxalic acid has a great effect on the bioavailability of essential minerals; When oxalic acid is combined with some transitional metal elements, soluble complexes are formed due to the coordination of oxalic acid, and their solubility is greatly increased [2]. Oxalic acid began to sublimate at 100℃, rapidly sublimated at 125℃, and substantially sublimated at 157℃, and began to decompose. Can react with alkali, can produce esterification, acyl halogenation, amide reaction. Reduction reactions can also occur, and decarboxylation reactions can occur under heat. Anhydrous oxalic acid is hygroscopic. Oxalic acid forms water-soluble complexes with many metals.
acidity	Oxalic acid is a weak acid. The first-order ionization constant Ka1=5.9×10-2 and the second-order ionization constant Ka2=6.4×10-5. It has the commonness of acid. Can neutralize with base, can make the indicator discoloration, can interact with carbonate to release carbon dioxide. For example, H2C2O4+Na2CO3=Na2C2O4+CO2↑+H2O H2C2O4 + zinc = ZnC2O4 + H2 write
reducibility	Oxalate has strong reducibility and can be easily oxidized into carbon dioxide and water when it interacts with oxidants. Acid potassium permanganate (KMnO4) solution can be discolored and reduced to 2 manganese ions. This reaction is used as a method to determine potassium permanganate concentration in quantitative analysis. The oxalic acid also washes away ink stains that have been splashed on strips of cloth. Kmno4 + 5 + 3 - h2so4 h2c2o4 = 2 + 2 mnso4 + K2SO4 write 10 co2 + 8 h2o H2C2O4 + NaClO = write NaCl + 2 co2 + H2O
instability	Oxalic acid will decompose into carbon dioxide, carbon monoxide and water at 189.5℃ or when it meets concentrated sulfuric acid. Write H2C2O4 = CO2 + CO write + H2O The laboratory can use this reaction to produce carbon monoxide gas. Ammonium hydrogen oxalate at 200 degrees breaks down into carbon dioxide, carbon monoxide, ammonia, and water.
toxicity	Oxalic acid is toxic, irritating and corrosive to the skin and mucous membranes, and is easily absorbed by the epidermis and mucous membranes to cause poisoning. The maximum allowable concentration in the air is 1mg/m3
esterification reaction	Glycolic acid can react with alcohols to form esters, for example, glycolic acid reacts with ethanol to form diethyl glycolate.
acute toxicity	Rat transoral LD50:7500 mg/kg; Mouse peritoneal LD50:270 mg/kg
Stimulus data	Skin - Rabbit 500mg / 24h Mild; Eye - Rabbit 0.25mg / 24h heavy
security	It is corrosive and irritant to the skin and mucous membrane. Inhalation of steam and dust will cause poisoning, and ingestion will cause gastroenteritis, vomiting, diarrhea and other symptoms. The minimum lethal dose in adults is 71mg/kg.
Ecological data	The substance may be harmful to the environment, and special attention should be paid to the water body. The product has strong irritant and strong corrosion. Its dust or concentrated solution can cause serious damage to the skin, eyes or mucous membranes. It has strong toxicity and corrosion. The minimum lethal dose of oxalic acid in humans is 71mg/kg, and the lethal dose in adults is 15-30g. If people take 5g oxalic acid orally, gastrointestinal inflammation, collapse, convulsion, shock and other symptoms and even death will occur. Chronic intoxication by inhalation of oxalic acid vapors results in extreme weakness, nasal mucosa ulcers, cough, general pain, vomiting, weight loss and protein in urine.
exist	Oxalic acid is found throughout nature, often in the form of oxalate in the cell membranes of plants such as cowflower, clover, sorrel, and sorrel. Almost all plants contain calcium oxalate. Oxalic acid is a common component of plants, especially herbaceous plants. It exists in the form of potassium salt or calcium salt, and in the form of free acid in begonia and banana.
water solubility	water solubility
vapour pressure	2.51E-06mmHg at 25°C
solubility	Soluble in water, ethanol, insoluble in benzene, chloroform.
Storage condition	2-8℃
appearance	white crystal
product use	Mainly used as reducing agent and bleach, dyeing industry mordant, also used for refining rare metals, synthesis of various oxalate ester, oxalate and oxalamide Oxalic acid, also known as glycolic acid, is the simplest dibasic acid. It is widely found in nature, especially in plants, such as herbs, rhubarb, oxalis, spinach, etc., and often exists in the form of potassium salt. Oxalate is present in the urine of humans and carnivores in the form of calcium salts or oxalate, which is the main component of urinary tract stones. The two carboxyl groups in oxalic acid molecule are directly connected, which has some special properties. For example, oxalic acid is reductive, which can reduce potassium permanganate to manganese divalent. This reaction is used as a method to determine the concentration of potassium permanganate in quantitative analysis. Oxalic acid can also be used as a bleaching agent for fibers, oils and tanning industries, also taking advantage of its reducing properties. Oxalic acid is heated and decarboxylated to produce carbon dioxide, carbon monoxide and water. Carbon monoxide gas can be produced by thermal decomposition of oxalic acid in laboratory. Oxalic acid forms water-soluble complexes with many metals. Oxalic acid can be used as rust, ink stain cleaning agent and metal polishing agent. Oxalic acid can remove rust. Go to a chemical store and buy a bottle of oxalic acid. Take some and rub it over the rust stains with a solution of warm water. Sell oxalic acid shop, generally sell some medical equipment, glass instruments. Antimony oxalate is used as a mordant and ammonium ferric oxalate is used as a blueprint agent.
security	5% solution (dihydrate) rat transoral LD50:9.5mL/kg. The product is strongly irritating and corrosive. Its dust or concentrated solution can cause serious damage to the skin, eyes or mucous membranes. It has strong toxicity and corrosion. The minimum lethal dose of oxalic acid in humans is 71mg/kg, and the lethal dose in adults is 15-30g. If people take 5g oxalic acid and oxalic acid orally, gastrointestinal inflammation, collapse, convulsion, shock and other symptoms will occur and even death. Chronic intoxication by inhalation of oxalic acid vapors results in extreme weakness, nasal mucosa ulcers, cough, general pain, vomiting, weight loss and protein in urine. The allowable amount of oxalic acid in the air is 1g/m3. Staff should be well protected. Storage temperature generally does not exceed 40℃. Store in a cool, ventilated warehouse. Keep away from fire and heat. Keep out of direct sunlight. Keep the container sealed. Should be stored separately from oxidant and alkali.

Basic Info

Product Name:

Oxalic acid

Other Name:

Ethanedioic acid;Oxalic acid;Aktisal;Aquisal;NSC 132055;NSC 151956;NSC 62774;NSC 76990;Ultraplast Activate S 52;DeerClean;Ethanedioic acid,conjugate acid (1:2);63504-28-9;97993-78-7;216451-38-6;2469072-60-2

CAS No.:

144-62-7

Molecular Formula:

C2H2O4

InChIKeys:

InChIKey=MUBZPKHOEPUJKR-UHFFFAOYSA-N

Molecular Weight:

90.034

Exact Mass:

90.03

EC Number:

208-932-1

UNII:

9E7R5L6H31

ICSC Number:

0529

NSC Number:

62774

UN Number:

3261|1759

DSSTox ID:

DTXSID0025816

Color/Form:

ANHYDROUS OXALIC ACID, CRYSTALLIZED FROM GLACIAL ACETIC ACID IS ORTHORHOMBIC, CRYSTALS BEING PYRAMIDAL OR ELONGATED OCTAHEDRA|Colorless powder or granular solid [Note: The anhydrous form (COOH)2 is a white powder].

HScode:

2917111000

Categories:

Carboxylic Acids and Derivatives

Characteristics

PSA:

74.6

XLogP3:

-0.3

Appearance:

Oxalic acid is an odorless white solid. Sinks and mixes with water. (USCG, 1999)

Density:

1.9 g/cm³

Melting Point:

189.5 °C (decomp)

Boiling Point:

200 °C @ Press: 0.1 Torr

Flash Point:

188.8±19.7 °C

Refractive Index:

1.480

Water Solubility:

14%

Storage Conditions:

STORE IN COOL, DRY, WELL-VENTILATED LOCATION. /OXALIC ACID DIHYDRATE/

Vapor Pressure:

<0.001 mmHg

Vapor Density:

4.3

Flammability characteristics:

Combustible Solid

Odor:

Odorless.

Henrys Law Constant:

1.43e-10 atm-m3/mole|Henry's Law constant: 1.4X10-10 atm-cu m/mole at 25 °C (experimental)

Dissociation Constants:

pKa 1: 1.46; pKa 2: 4.40

Experimental Properties:

MP: 101-102 °C GIVING OFF WATER OF CRYSTALLIZATION & STARTING TO SUBLIME; K1= 5.36X10-2; K2= 5.3X10-5; DENSITY: 1.653 @ 18.5 °C/4 °C; DENSITY OF 1% (WT/WT) AQ SOLN: 1.0035 @ 17.5 °C/4 °C; DENSITY OF 3% (WT/WT) AQ SOLN: 1.0105 @ 17.5 °C/4 °C; DENSITY OF 5% (WT/WT) AQ SOLN: 1.0175 @ 17.5 °C/4 °C; DENSITY OF 10% (WT/WT) AQ SOLN: 1.0350 @ 17.5 °C/4 °C; DENSITY OF 13% (WT/WT) AQ SOLN: 1.0455 @ 17.5 °C/4 °C /OXALIC ACID DIHYDRATE/|DISSOCIATION CONSTANT: 6.5X10-2 /OXALIC ACID DIHYDRATE/|SUBLIMES BEST @ 157 °C; @ HIGHER TEMP DECOMP INTO CO2, CARBON MONOXIDE, FORMIC ACID, & WATER; HYGROSCOPIC|MONOCLINIC TABLETS, PRISMS, OR GRANULES; 1 G DISSOLVES IN 7 ML WATER; 1 G DISSOLVES IN 2 ML BOILING WATER; 1 G DISSOLVES IN 2.5 ML ALCOHOL; 1 G DISSOLVES IN 1.8 ML BOILING ALCOHOL; 1 G DISSOLVES IN 100 ML ETHER; 1 G DISSOLVES IN 5.5 ML GLYCEROL /OXALIC ACID DIHYDRATE/|Transparent, colorless crystals or white powder /Oxalic acid dihydrate/|Odorless /Oxalic acid dihydrate/|For more Other Experimental Properties (Complete) data for OXALIC ACID (6 total), please visit the HSDB record page.

Air and Water Reactions:

Water soluble. Hygroscopic

Reactive Group:

Acids, Carboxylic

Reactivity Profile:

OXALIC ACID is hygroscopic and sensitive to heat. This compound may react violently with furfuryl alcohol, silver, sodium, perchlorate, sodium hypochlorite, strong oxidizers, sodium chlorite, acid chlorides, metals and alkali metals. (NTP, 1992). The heating of mixtures of Oxalic acid and urea has lead to explosions. This is due to the rapid generation of the gases CO2, CO, and NH3 [Praxis Naturwiss. Chem., 1987, 36(8), 41-42]. Oxalic acid and urea react at high temperatures to form toxic and flammable ammonia and carbon monoxide gases, and inert CO2 gas [Von Bentzinger, R. et al., Praxis Naturwiss. Chem., 1987, 36(8), 41-42].

Autoignition Temperature:

Not flammable (USCG, 1999)

Heat of Combustion:

-245.61 KJ/mol

Flammable Limits:

Combustible Solid

See More Oxalic acid Properties 

Hazard Identification

Classification of the substance or mixture

Acute toxicity - Category 4, Oral

Acute toxicity - Category 4, Dermal

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Warning
Hazard statement(s)	H302 Harmful if swallowed H312 Harmful in contact with skin
Prevention	P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
Response	P301+P317 IF SWALLOWED: Get medical help. P330 Rinse mouth. P302+P352 IF ON SKIN: Wash with plenty of water/... P317 Get medical help. P321 Specific treatment (see ... on this label). P362+P364 Take off contaminated clothing and wash it before reuse.
Storage	none
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

NO open flames. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Separated from strong oxidants and food and feedstuffs. Dry. Well closed.STORE IN COOL, DRY, WELL-VENTILATED LOCATION. OXALIC ACID DIHYDRATE

See More Oxalic acid Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Melamine,ethyl acetate,maleic anhydride,acetic acid,tetrahydrofuran,butyl acetate

Location:
Room 21-1, 14th floor, Zone (A), Guangrao City Commercial Complex, Quanfu Yuan, Guangrao County, Dongying City, Shandong Province

Payment Terms:
TT against copy of documents,L/C

Average lead Time:
20

Total Annual Revenue:
$50 million-$100 million

Total Employees:
51-100

Year of Establishment:
2018

Shandong Lingnuo chemical Co.,Ltd is located in Dongying City, Shandong Province, export more than ten years It is mainly exported to Africa, Asia,Middle East,South America , mainly delaing with product tetrahydrofuran, Melamine, Methylene chloride, aniline oil, Dimethyl Formamide,Acetic acid, Isopropyl Alcohol, Maleic anhydride,Methyl Acetate,DMSO, Ethanol and so on.

Inquiry History

48 Inquiries

Country	Product	Purchase Quantity	Date Posted
France	Custom Blend CAS 144-62-7 CAS 65997-17-3 CAS 68081-81-2	400 G	May 13, 2026
India	Oxalic Acid	125.00 KG	Feb 26, 2024
Turkey	Oxalic Acid	100 KG	Jul 9, 2026
Malaysia	OXALIC ACID	1400 KG	Jun 25, 2026
Thailand	Oxalic acid 99.6%	1.00 20' Fcl	Jun 9, 2026
Indonesia	oxalic acid	25 MT	Jun 3, 2026
Poland	oxalic acid	1.00 20' Fcl	Aug 23, 2025
Egypt	Zinc ash	4.00 BOU	May 29, 2025
United States	OXALIC ACID	1200 MT	Apr 19, 2025
India	Oxalic Acid	100 MT	Apr 7, 2025
Pakistan	oxalic acid	1 20' Fcl	Mar 24, 2025
India	Oxalic Acid	1 MT	Feb 27, 2025
Vietnam	Oxalic Acid	50 MT	Dec 24, 2024
Thailand	Oxalic Acid	10 MT	Nov 8, 2024
Malaysia	Oxalid Acid	1 20' Fcl	Jul 22, 2024
United States	Oxalic acid	200000 KG	Jul 14, 2024
Pakistan	Oxalic acid	5 TON	Jun 28, 2024
Japan	OXALIC ACID	25 MT	Jun 24, 2024
Egypt	Oxalic Acid	92 MT	Jun 24, 2024
Malaysia	OXALIC ACID	2700 MT	Jun 11, 2024

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Oxalic acid 99.5% Colorless transparent crystal

Product Description

Seller Information

Inquiry History

Classification of the substance or mixture

GHS label elements, including precautionary statements

Other hazards which do not result in classification

Precautions for safe handling

Conditions for safe storage, including any incompatibilities

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