D-Malic acid sort: Pharmaceutical Intermediates CAS No.: 636-61-3 Formula: C4H6O5 Formula Weight: 134.09 Appearance: White or off-white crystalline powder Structure: Chemical purity: ≥ 98.0% Optical purity: ≥ 99.0%e.e. Optical rotation: [α]D20=+111o (C=3,NaOH)