3 components: Hexanoic acid [CAS:142-62-1] 2% Octanoic acid [CAS:124-07-2] 1.5% Nonanoic acid [CAS:112-05-0] 5% in Toluene CRM, ISO 17034 and ISO 17025,,,, Conservation 12 months. ,,,, Store in a refrigerator at temperatures between 2C to 8C,,, 1 * 5 mL