Home / Standards / GB 12009. GB 12009. Determination of Hydrolyzable Chlorine Content in Isocyanates — 2-89 异氮酸醋中水解氯含量测定方法 2一89 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A