The affected product ref 367001, BD vacutainer tube sodium fluoride: 100 mg, potassium oxalate: 20 mg, gray top, 10 ml contains isobutylene (also known as isobutene or 2-methylpropene) which in a recent publication demonstrated potential interference in determination of methanol by gas chromatography (GC) methods. Other non-GC methods are not impacted. Recall start date: September 15, 2022