- HCl - M = 36,46 g/mol - CAS [7647-01-0] - EINECS-No.: 231-595-7 - Density: 1,00 g/cm3 - EC-Index-No.: 017-002-01-X - Tariff number: 2806 10 00 00 - Applications: analytical chemistry, laboratory reagent. SPECIFICATIONS factor: 0,999 - 1,001 uncertainty ± 0,001 1 ml = 0,003646 g HCl This solution was analysed using a certified reference material (tris(hydroxymethyl)-aminomethane). The certified reference material is ISO 17034 accredited, measured according to ISO/IEC 17025 and traceable to the International System of Units by means of a Standard Reference Material from NIST: SRM® 723 (Tris(hydroxymethyl)aminomethane (HOCH2)3CNH2 (Acidimetric Standard)).