TERATHANE® PTMEG is comprised of alpha-hydro-omegahydroxypoly-(oxytetramethylene) (CAS # 25190-06-1) with 150-500 ppm of 2,6-di-tert-butyl-p-cresol (BHT, Butylated hydroxytoluene, CAS# 128-37-0) as an antioxidant.
In the United States, BHT is listed as generally recognized as safe (GRAS) for use in food in 21 C.F.R. §182.3173. Pursuant to 21 C.F.R. §174.5, substances that are GRAS for direct addition to food can also be used in food-contact applications.
As to PTMEG, FDA's regulations clear several polymers produced from PTMEG for use in food contact applications in the following sections of the Code of Federal Regulations:
- 21 CFR 175.105 Adhesives
- 21 CFR 177.1590 Polyester elastomers
- 21 CFR 177.1630 Polyethylene phthalate polymers)
- 21 CFR 177.1680 Polyurethane resins
- 21 CFR 177.2600 Rubber articles intended for repeated use
Please note that INVISTA makes no representations regarding the FDA regulatory status of polymers produced from TERATHANE® PTMEG; it is the customer's responsibility to ensure that the TERATHANE® PTMEG based polymer is FDA compliant. The regulatory listings included above are merely intended to illustrate the ways in which TERATHANE® PTMEG potentially can be used to produce FDA-compliant polymers.