Potassium pyrosulfate 7790-62-7

Used as an acidic solvent in chemical analysis and as an inclusion agent for electrolytic metals in steel analysis.

Potassium pyrosulfate Basic information
Product Name:	Potassium pyrosulfate
CAS:	7790-62-7
MF:	K2O7S2
MW:	254.32
EINECS:	232-216-8
Mol File:	7790-62-7.mol
Potassium pyrosulfate Chemical Properties
Melting point	325 °C
density	2.28 g/mL at 25 °C (lit.)
bulk density	830kg/m3
storage temp.	no restrictions.
solubility	H2O: 0.1 M at 20 °C, clear, colorless
form	Solid
Specific Gravity	2.28
color	White
PH	0.8 (50g/l, H2O, 20℃)
Odor	Odorless
PH Range	1 - 2 at 25.5 g/l at 25 °C
Water Solubility	MAY DECOMPOSE
Sensitive	Hygroscopic
Merck	147,664
Stability:	Stable. Incompatible with strong acids, strong bases.
CAS DataBase Reference	7790-62-7(CAS DataBase Reference)
EPA Substance Registry System	Disulfuric acid, dipotassium salt (7790-62-7)

Potassium pyrosulfate Basic information
Product Name:	Potassium pyrosulfate
CAS:	7790-62-7
MF:	K2O7S2
MW:	254.32
EINECS:	232-216-8
Mol File:	7790-62-7.mol
Potassium pyrosulfate Chemical Properties
Melting point	325 °C
density	2.28 g/mL at 25 °C (lit.)
bulk density	830kg/m3
storage temp.	no restrictions.
solubility	H2O: 0.1 M at 20 °C, clear, colorless
form	Solid
Specific Gravity	2.28
color	White
PH	0.8 (50g/l, H2O, 20℃)
Odor	Odorless
PH Range	1 - 2 at 25.5 g/l at 25 °C
Water Solubility	MAY DECOMPOSE
Sensitive	Hygroscopic
Merck	147,664
Stability:	Stable. Incompatible with strong acids, strong bases.
CAS DataBase Reference	7790-62-7(CAS DataBase Reference)
EPA Substance Registry System	Disulfuric acid, dipotassium salt (7790-62-7)

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.