Molekula
Oxalic acid dihydrate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Oxalic acid dihydrate is a white crystalline solid used in cleaning, bleaching, and as a reagent in chemical synthesis. It is a strong organic acid commonly employed in metal cleaning and rust removal. Industrial buyers also use it in textile printing and dyeing, leather tanning, and pulp and paper processing, and as a chelating and pH-regulating agent. Available in powder or crystal form, it has a molecular weight of 126.07 g/mol, a molecular formula of C₂H₂O₄ · 2H₂O, and a CAS number of 6153-56-6. Store at ambient temperature. Handle with care due to its toxicity and corrosive nature. Molekula supplies Oxalic acid dihydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £40.00 per pack ex VAT · £48.00 inc. VAT
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1 kg — £71.60 per pack ex VAT · £85.92 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Assay | 99.5% min |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 101-102 °C |
| Vapour Pressure | 0.54 mmHg at 105 °C |
Source: PubChem CID 61373 (ICSC, PAC Chemical Database)
Identification
| Property | Value |
|---|---|
| SKU | 80163036 |
| CAS Number | 6153-56-6 |
| IUPAC Name | oxalic acid;dihydrate |
| Molecular Formula | C2H2O4 · 2H2O |
| Molecular Weight | 126.07 |
| Exact Mass | 126.0164 |
| SMILES | C(=O)(C(=O)O)O.O.O |
| InChIKey | GEVPUGOOGXGPIO-UHFFFAOYSA-N |
| InChI | InChI=1S/C2H2O4.2H2O/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);2*1H2 |
| PubChem CID | 61373 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29171100 |
| Tariff Code | 2917110091 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H302 Harmful if swallowed
- H312 Harmful in contact with skin
- H318 Causes serious eye damage
- H373 May cause damage to organs through prolonged or repeated exposure
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P314 Get medical advice/attention if you feel unwell
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- alpha oxalic acid dihydrate
- dihydrate oxalic acid
- Ethanedioic acid, dihydrate
- OXALIC ACID (1,2-13C2)
- Oxalic acid--water (1/2)
- OXALICUM ACIDUM
- VARROMED COMPONENT OXALIC ACID DIHYDRATE
Frequently asked questions
What is oxalic acid dihydrate used for?
It is commonly used as a cleaning agent, rust remover, and in the synthesis of other chemicals, including pharmaceuticals and dyes.
What is the chemical formula and molecular weight of oxalic acid dihydrate?
The formula is C2H2O4 · 2H2O with a molecular weight of 126.07 g/mol.
How should oxalic acid dihydrate be stored?
It should be stored at ambient temperature in a dry, well-ventilated area away from incompatible materials.
What grade is available for oxalic acid dihydrate?
We offer reagent grade oxalic acid dihydrate suitable for laboratory and industrial applications.
Can Molekula supply oxalic acid dihydrate in bulk?
Yes, we can supply oxalic acid dihydrate in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with an order of oxalic acid dihydrate?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.