Fisher Scientific UK Ltd.
part of Thermo Fisher Scientific
Bishop Meadow Road,
LE11 5RG
Specification Sheet

Fisher Scientific's Quality System has been found to conform to Quality Management System Standard ISO9001:2015 by SAI Global Certificate Number QMS42099

Catalogue Number: J/2820 Expiry Phrase: Use within 2 yrs of opening

Description: Standard buffer solution, pH4
Grade: Buffer Solution Application:

Result Name Specification Units
pH @ 20'C >= 3.98 and <= 4.02 pH
pH @ 25'C (calculated) >= 3.99 and <= 4.03 pH

Additional Information: This product is traceable to NIST. The pH value is determined from the response of a calibrated glass electrode. The pH scale is that defined in BS1647:1984. The glass electrode is calibrated by measuring its response when immersed in reference buffer solutions. Reference buffer solutions are prepared according to the formulations in the British Standard and are traceable to NIST reference material.

Mrs Paula Faulkes Sunday 16th of June 2024
Quality Assurance Manager.

Note: The data listed is valid for all package sizes of this lot of this product, expressed as an extension of the catalogue number listed above. If there are any questions regarding this certificate, please call Technical Support on +32 1456 5600