MATERIAL SAFETY DATA SHEET SRM Supplier: National Institute of Standards and Technology SRM Number: 186g Standard Reference Materials Program MSDS Number: 186g 100 Bureau Drive, Stop 2321 SRM Name: pH Standards Gaithersburg, Maryland 20899-2321 Potassium Dihydrogen Phosphate (186-I-g); Disodium Hydrogen Phosphate (186-II-g) Date of Issue: 07 November 2003 MSDS Coordinator: Carmen Davis Phone: (301) 975-6776 FAX: (301) 926-4751 ChemTrec: 1-800-424-9300 E-mail:
[email protected] SECTION I. MATERIAL IDENTIFICATION Material Name: pH Standards: Potassium Dihydrogen Phosphate (186-I-g); Disodium Hydrogen Phosphate (186-II-g) Description: SRM 186g consists of two components, each prepared to ensure high purity and uniformity: KH2PO4, Potassium Dihydrogen Phosphate (186-I-g) and Na2HPO4, Disodium Hydrogen Phosphate (186-II-g). However, neither SRM component is certified for purity of substance. A unit of SRM 186g consists of 30 g of potassium dihydrogen phosphate (186-I-g) and 45 g of disodium hydrogen phosphate (186-II-g), each contained in its respective clear glass bottle. Other Designations: Potassium Dihydrogen Phosphate (potassium acid phosphate; monopotassium phosphate; potassium diphosphate; potassium biphosphate; potassium orthophosphate; potassium dihydrogen phosphate) Disodium Hydrogen Phosphate (disodium phosphate; disodium acid orthophosphate; soda phosphate; disodium phosphoric acid; disodium monohydrogen phosphate; monohydrogen disodium phosphate; DSP; sodium phosphate; sodium phosphate (Na2HPO4); hydrogen disodium phosphate; phosphoric acid, disodium salt; sodium monohydrogen phosphate; anhydrous sodium acid phosphate; disodium acid phosphate; dibasic sodium phosphate; disodium orthophosphate; disodium hydrogenorthophosphate) Name Chemical Formula CAS Registry Number Potassium Dihydrogen Phosphate KH2PO4 7778-77-0 Disodium Hydrogen Phosphate Na2HPO4 7558-79-4 DOT Classification: Potassium dihydrogen phosphate and disodium hydrogen phosphate are not regulated by DOT.