In Stock. Receive by. £56.70 (exc. VAT) £68.04 (inc. VAT) Qty: Add to Basket. Each box of 25 vials is supplied with a Hanna certificate of quality. The reagents are traceable to NIST SRM® 930. Low range: 0 to 150 mg/L (as O2), dichromate EPA method. HI-93754A-25 Low Range COD Reagents information.