ChemicalBook > CAS DataBase List > Oxalic acid dihydrate

Oxalic acid dihydrate

Product Name
Oxalic acid dihydrate
CAS No.
6153-56-6
Chemical Name
Oxalic acid dihydrate
Synonyms
ETHANEDIOIC ACID;Oxalate Acid;OXALIC ACID 2HYD XTL;Has two acid;OxalicAcidGr;OXALIC ACID 2H2O;OXALIC ACID PURE;ACS, 99.5-102.5%;Ethanedionic acid;ic acid dihydrate
CBNumber
CB1303757
Molecular Formula
C2H6O6
Formula Weight
126.07
MOL File
6153-56-6.mol
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Oxalic acid dihydrate Property

Melting point:
104-106 °C(lit.)
Boiling point:
108-109°C
Density 
1,65 g/cm3
vapor density 
4.4 (vs air)
vapor pressure 
<0.01 mm Hg ( 20 °C)
Flash point:
157°C
storage temp. 
Store at +5°C to +30°C.
solubility 
H2O: soluble1M at 20°C, clear, colorless
form 
Powder/Solid
Specific Gravity
1.65
color 
Yellow to yellow-green
PH
~1.0 (25℃, 1M in H2O)
PH Range
6 - 8 at 25 °C
Water Solubility 
138 g/L (20 ºC)
Sublimation 
157 ºC
Merck 
14,6911
BRN 
3679436
Exposure limits
TLV-TWA for anhydrous acid 1 mg/m3 (ACGIH, MSHA, and OSHA); TLV-STEL 2 mg/m3 (ACGIH).
Stability:
Stable. Incompatible with bases, acid chlorides, steel, silver, silver compounds, moisture. Avoid contact with metals.
InChIKey
GEVPUGOOGXGPIO-UHFFFAOYSA-N
CAS DataBase Reference
6153-56-6(CAS DataBase Reference)
NIST Chemistry Reference
Oxalic acid dihydrate(6153-56-6)
EPA Substance Registry System
Oxalic acid dihydrate (6153-56-6)
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Safety

Hazard Codes 
Xn,C
Risk Statements 
21/22-41
Safety Statements 
24/25-39-37-36-26
RIDADR 
UN 3261 8/PG 3
WGK Germany 
1
RTECS 
RO2450000
TSCA 
Yes
HazardClass 
8
PackingGroup 
III
HS Code 
29171100
Toxicity
LD50 orally in Rabbit: 375 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H318Causes serious eye damage

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
PHR2545
Product name
Oxaliplatin Related Compound A
Purity
Pharmaceutical Secondary Standard; Certified Reference Material
Packaging
200MG
Price
$308
Updated
2024/03/01
Sigma-Aldrich
Product number
8.18242
Product name
Oxalic acid dihydrate
Purity
for synthesis
Packaging
100g
Price
$46
Updated
2024/03/01
Sigma-Aldrich
Product number
8.18242
Product name
Oxalic acid dihydrate
Purity
for synthesis
Packaging
1kg
Price
$124
Updated
2024/03/01
Sigma-Aldrich
Product number
8.18242
Product name
Oxalic acid dihydrate
Purity
for synthesis
Packaging
25kg
Price
$365
Updated
2024/03/01
Sigma-Aldrich
Product number
247537
Product name
Oxalic acid dihydrate
Purity
ACS reagent, ≥99%
Packaging
2.5kg
Price
$350
Updated
2024/03/01
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Oxalic acid dihydrate Chemical Properties,Usage,Production

Chemical Properties

white crystals

Uses

A diprotic reducing agent used as a buffer.

Uses

Oxalic acid occurs in the cell sap of Oxalisand Rumex species of plants as the potassium and calcium salt. It is the metabolicproduct of many molds (Merck 1989). Thereare a large number of applications of thiscompound, including indigo dyeing; calicoprinting; removal of paint, rust, and inkstains; metal polishing; bleaching leather; inpesticide compositions and manufacture ofoxalates. It is also used as an analyticalreagent and as a reducing agent in organicsynthesis.
Addition of oxalic acid to chromic acid forthe anodizing of Al alloy has been reported tomodify the morphology and improve the corrosion performance of anodic films (Moutarlier et al. 2004). Also, it is a very effectiveadditive for the ozone treatment of cellulose.It prevents the degradation of cellulose fromozone bleaching.

Uses

Oxalic acid dihydrate is a purifying agent in pharmaceutical industry, special in antibiotic medication, such as Oxytetracycline , Chloramphenicol , etc; * Precipitating agent in Rare-earth mineral processing; * Bleaching agent in the textile activities, wood pulp bleaching; * Rust-remover for Metal treatment; * Grinding agent, such as Marble polishing; * Waste water treatment, removing calcium from water.

Definition

Oxalic acid dihydrate (OAD) which has very high initial phase transition enthalpy is a promising phase change material (PCM). This compound is low manufacturing cost and wide usage. In OAD, alternating acid and water molecules that act both as hydrogen-bond donors and acceptors. OAD needs a lot of energy to break the hydrogen-bond in the melting process. Therefore, OAD has a very high heat of fusion of 370 J·g-1,which is a very promising PCM in TES for applications such as industrial waste heat recovery or solar energy storage systems[1].

General Description

Oxalic acid dihydrate (OAD) crystals are reported to be monoclinic with P21/n space group. The electron density of OAD has been obtained using X-ray diffraction studies under high resolution.

Reactivity Profile

At high temperatures oxalic acid decomposes, producing toxic carbon monoxide, andformic acid. Mixing with warm sulfuric acidmay produce the same products: CO2, CO,and formic acid. It reacts with many silvercompounds, forming explosive silver oxalate(NFPA 1986). An explosion occurred whenwater was added to an oxalic acid/sodiumchlorite mixture in a stainless steel beaker.There was also evolution of highly toxicchlorine dioxide gas (MCA 1962). Oxalicacid reacts violently with strong oxidizingsubstances.

Health Hazard

Oxalic acid is a strong poison. The toxicsymptoms from ingestion include vomiting, diarrhea, and severe gastrointestinaldisorder, renal damage, shock, convulsions,and coma. Death may result from cardiovascular collapse. The toxicity arises asoxalic acid reacts with calcium in the tissuesto form calcium oxalate, thereby upsettingthe calcium/potassium ratio (ACGIH 1986).Deposition of oxalates in the kidney tubulesmay result in kidney damage (Hodgson et al.1988).
Oxalic acid may be absorbed into the bodythrough skin contact. It is corrosive to theskin and eyes, producing burns. Dilute solutions of 10% strength may be a mild irritantto human skin. However, the inhalation toxicity is low because of its low vapor pressure.Airborne dusts can produce eyeburn and irritation of the respiratory tract.
LD50 value, oral (rats): 375 mg/kg.

Purification Methods

Crystallise oxalic acid from distilled water. Dry it in a vacuum over H2SO4. The anhydrous acid can be obtained by drying at 100o overnight. [Beilstein 2 IV 1819.]

Structure and conformation

The dihydrate H2C2O 4·2H2O has space group C52h–P21/n, with lattice parameters a = 611.9 pm, b = 360.7 pm, c = 1205.7 pm, β = 106°19′, Z = 2. The main inter-atomic distances are: C-C 153 pm, C-O1 129 pm, C-O2 119 pm. In theory, oxalic acid dihydrate is one of the very few crystalline substances that exhibit negative area compressibility. Namely, when subjected to isotropic tension stress (negative pressure), the a and c lattice parameters increase as the stress decreases from -1.17? to -0.12 GPa and from -1.17 to -0.51 GPa, respectively.

References

[1] Han, Lipeng , S. Xie , and J. Sun . "Preparation and thermal characterization of oxalic acid dihydrate/bentonite composite as shape-stabilized phase change materials for thermal energy storage." IUMRS International Conference in Asia 2017.

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View Lastest Price from Oxalic acid dihydrate manufacturers

Chongqing Chuandong Chemical (Group) Co. Ltd.
Product
Oxalic acid 6153-56-6
Price
US $5.00/KG
Min. Order
200000KG
Purity
99.6% MIN
Supply Ability
100000MT
Release date
2023-10-24
Chongqing Chuandong Chemical (Group) Co. Ltd.
Product
Oxalic acid 99.6% 6153-56-6
Price
US $5.00/KG
Min. Order
200000KG
Purity
99.6% MIN
Supply Ability
100000MT
Release date
2023-10-24
Chongqing Chuandong Chemical (Group) Co. Ltd.
Product
Oxalic acid dihydrate, Ethanedionic acid 6153-56-6
Price
US $5.00/KG
Min. Order
200000KG
Purity
99.6% MIN
Supply Ability
100000MT
Release date
2023-10-24

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