threitol threitol threitol is the chiral four-carbon sugar alcohol with the molecular formula c4h10o4. it is primarily used as an intermediate in the chemical synthesis of other compounds. it exists in the enantiomorphic forms d-threitol and l-threitol, the reduced forms of d- and l-threose. it is the diastereomer of erythritol, which is used as a sugar substitute. threitol names systematic iupac name (2r,3r)-butane-1,2,3,4-tetrol other names (2r,3r)-butane-1,2,3,4-tetraol (not recommended) identifiers cas number 2418-52-2 y 3d model (jsmol) interactive image beilstein reference 1719752 chebi chebi:48300 y chemspider 147828 y drugbank db03278 echa infocard 100.150.149 ec number 621-282-7 gmelin reference 1782960 kegg c16884 y pubchem cid 169019 unii 6dn82xbt5m y inchi inchi=1s/c4h10o4/c5-1-3(7)4(8)2-6/h3-8h,1-2h2/t3-,4-/m1/s1 ykey: unxhwfmmpawvpi-qwwzwvqmsa-n yinchi=1/c4h10o4/c5-1-3(7)4(8)2-6/h3-8h,1-2h2/t3-,4-/m1/s1key: unxhwfmmpawvpi-qwwzwvqmbp smiles oc(o)(o)co properties chemical formula c4h10o4 molar mass 122.12 appearance solid melting point 88 to 90 °c (190 to 194 °f; 361 to 363 k) hazards ghs labelling: pictograms signal word warning hazard statements h315, h319, h335 precautionary statements p261, p264, p271, p280, p302+p352, p304+p340, p305+p351+p338, p312, p332+p313, p337+p313, p362, p403+p233, p405, p501 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references in living organisms, threitol is found in the edible fungus armillaria mellea. it serves as a cryoprotectant (antifreeze agent) in the alaskan beetle upis ceramboides.