Controls approved for use in both EPA-compliant and mercury-free vialsMade from primary standard grade potassium hydrogen phthalateDelivered with an SDS and minimum 8 month shelf life (refrigeration required)Sold as one 250-mL bottleEasy-to-follow dilution directions printed directly on the labelPrimary Standard Grade Potassium Hydrogen Phthalate. Refrigeration is recommended.
Controls approved for use in both EPA-compliant and mercury-free vialsMade from primary standard grade potassium hydrogen phthalateDelivered with an SDS and minimum 8 month shelf life (refrigeration required)Sold as one 250-mL bottleEasy-to-follow dilution directions printed directly on the labelPrimary Standard Grade Potassium Hydrogen Phthalate. Refrigeration is recommended.
