All Inorganic Standards are Certified Reference Materials (CRM), produced and calibrated under a quality system that is: ISO 9001 certified accredited according to ISO/IEC 17025 - Testing accredited according to ISO 17034 - Reference Material Producer - Inorganic CRM > ICP & ICP-MS CRM > Single-Element Standards > 1000 mg/l for ICP - Product: Silicon Dioxide SiO2 - 1000 mg/l in H2O/tr. NaOH for ICP - Volume: 30ml bottle - Shelf life: 36 months - Storage: Store under normal laboratory conditions, at temperatures between 15°C to 25°C - CRM, ISO 17034 and ISO 17025 - Ref: CM 33501 This item is not kept in stock: Manufacture is after order date for this product. Delivery time is 2 to 4 weeks and products are always shipped with the full available shelf life.