Patent ID: 8562854

Claim:
A deicing/anti-icing fluid comprising: at least about 20% by weight of a freeze point depressant which is a mixture of glycerol and another short chain polyol selected from the group consisting of 1,2 propanediol, 1,3 propanediol, erythritol, diethylene glycol, xylitol, and mixtures thereof; at least about 10% by weight of water; a polycarboxylic acid thickener; a nonionic surfactant; the thickener associating with the surfactant to more efficiently thicken the fluid; a pH moderator; and a chelating agent; the fluid meeting the requirements of SAE/AMS 1428 or its revisions for a non-Newtonian, Type II or IV aircraft deicing/anti-icing fluid; and the fluid having a low aquatic toxicity as measured by an LC 50 of at least 1,000 mg/L.