cerium oxalate cerium oxalate cerium(iii) oxalate (cerous oxalate) is the inorganic cerium salt of oxalic acid. it is a white crystalline solid with the chemical formula of ce2(c2o4)3. it could be obtained by the reaction of oxalic acid with cerium(iii) chloride. cerium oxalate names iupac name cerium(iii) oxalate other names cerium oxalatecerous oxalate identifiers cas number 139-42-4 y 3d model (jsmol) interactive image chemspider 145101 echa infocard 100.004.875 pubchem cid 165565 unii 96p72ve680 y inchi inchi=1s/3c2h2o4.2ce/c3*3-1(4)2(5)6;;/h3*(h,3,4)(h,5,6);;/q;;;2*+3/p-6key: zmznlkyxlarxfy-uhfffaoysa-h smiles c(=o)(c(=o)).c(=o)(c(=o)).c(=o)(c(=o)).. properties chemical formula c6ce2o12 molar mass 544.286 g·mol−1 appearance white crystals melting point decomposes solubility in water slightly soluble pharmacology atc code a04ad02 (who) hazards occupational safety and health (ohs/osh): main hazards corrosive, irritant, respiratory irritant, toxic ghs labelling: pictograms signal word danger hazard statements h301, h311, h314, h319, h331, h335, h370 precautionary statements p260, p264, p270, p271, p280, p301+p310, p302+p352, p304+p340, p305+p351+p338, p308+p313, p332+p313, p403+p233 nfpa 704 (fire diamond) 3 0 1 flash point 188.8 °c safety data sheet (sds) external sds except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). y verify (what is yn ?) infobox references uses cerium(iii) oxalate is used as an antiemetic. it has been identified as part of the invisible ink that was used by stasi operatives during the cold war. toxicity cerium(iii) oxalate irritates skin and mucous membranes, and is a strong irritant to eyes. if it gets into the eyes, there is a danger of severe eye injury. cerium salts increase the blood coagulation rate, and exposure to cerium salts can cause sensitivity to heat. oxalates are corrosive to tissue and are powerful irritants. they have a caustic effect on the linings of the digestive tracts and can cause kidney damage.