Enviro-Safe® liquid is a non-toxic mixture of biodegradable citrus liquid and a green, non-toxic dye. This liquid is used in Enviro-Safe®, Easy-Read®, Double-Safe™ and FRIO-Temp® thermometers. The liquid inside an Enviro-Safe® thermometer has been certified environmentally friendly by an independent third party, *EnviroKleen™.Enviro-Safe® liquid consists of a mixture of biodegradable citrus oil and a green, non-toxic dye. The liquid is non-hazardous and is considered extremely safe in any working environment. This eliminates dangers for the user and eliminates any disposal concerns. EnviroKleen™ “Green” Certification Program was developed in order to identify the products that have the least negative impact on the environment and are safe for personal/commercial/industrial use.