Hummel Croton Inc.
10 Harmich Road
South Plainfield, NJ 07080

Tel: 908-754-1800
Fax: 908-754-1815

Data Sheet
Oxalic Acid Dihydrate

Product Code 15-7500
Appearance White Crystals
Purity 99.6% Min
Heavy Metals 0.001% Max
Iron 0.001% Max
Sulfates 0.07% Max
Residue after Ignition 0.09% Max
Chlorides 0.002% Max
Water Insolubles Metals 0.05% Max


PACKAGING: 55 lb. and 110 lb. Bag

USES: Oxalic acid is used for removing paint, varnish, rust and ink stains, auto radiator cleanser, purifying agent, and leather tanning. It is also a catalyst used for blending textiles and a reducing agent.

HANDLING: Strong irritant – toxic by ingestion or inhalation. Store in a cool, dry place. OSHA PEL and ACGIH TLV-TWA have been established for this compound at 1mg/m3. See SDS for more information.

PROPER SHIPPING NAME: Corrosive Solid, Acidic, Organic, n.o.s. (Oxalic Acid)

SHIPPING INFORMATION: UN# 3261, Class 8, PG III, Label Code 8

Oxalic Acid Dihydrate

CAS Number 144-62-7
RTEC Number RO 2450000
Melting point 101-102 ° C
Water Solubility 1g in 7ml
EINEC Number 2056343
Molecular Wt. 126.06
Molecular Formula C2H2O4 • 2H2O

No warranty, expressed or implied, or merchantability, fitness for a particular purpose or otherwise is made, except that the products herein discussed comply with the chemical description on the labels. Buyer assumes risks of the use, storage and handling. Hummel shall not be liable for any incidental or consequential damages arising directly or indirectly in connection with the purchase, use, storage or handling of this product. The information contained herein is, to the best of our knowledge, true and accurate. However, all recommendations or suggestions are made without guarantee, since the conditions of use are beyond our control. We disclaim any liability incurred in connection with the use of these data or suggestions. This information is not to be taken as a license to operate under, or a recommendation to infringe any patent(s). The observance of all regulations and patents is the responsibility of the user. No agent, representative or employee of this company is authorized to vary any terms of this notice.