CAS 29435-48-1 appears in our catalog under these names: Poly((R)–3–hydroxybutyric acid), Poly[(R)-3-hydroxybutyric acid] (natural origin), POLY(3-HYDROXYBUTYRIC ACID), NATURAL. Offered by: GLPBio, Chemat, Sigma-Aldrich. Available pack sizes: 1g, 250mg, 25g, 5g, 100g, 10g.