Spectracer offers analytical reagents for wet chemistry, titration, water quality control, and electrochemistry, including specialty reagents for a number of analytical applications, such as Karl Fischer titration, Nessler's Reagent, Biuret Reagent, Griess Illosvay's Reagent and many other reagents.- Analytical CRM > Total Base Number (TBN) CRM - Product: Total Base Number (TBN) - 10 mgKOH/g - Weight: 75g bottle - Shelf life: 24 months - Storage: Store under normal laboratory conditions, at temperatures between 15°C to 25°C - CRM, ISO 17034 and ISO 17025 - Ref: CM 33989 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.