NSF ANSI CAN 60:2019 pdf download.Drinking Water Treatment Chemicals -Health Effects.
NSF ANSI CAN 60 contains health effects requirements for drinking water treatment chemicals that are directly added to water and are intended to be present in the finished water. NSF ANSI CAN 60 also contains health effects requirements for other chemical products that are directly added to water but are not intended to be present in the finished water. Chemicals covered by this Standard include, but are not limited to, coagulation and flocculation chemicals, softening, precipitation, sequestering, pH adjustment, and corrosion I scale control chemicals, disinfection and oxidation chemicals, miscellaneous treatment chemicals, and miscellaneous water supply chemicals.
Contaminants produced as by-products through reaction of the treatment chemical with a constituent of the treated water are not covered by this Standard.
Acknowledging the fact that indigenous microorganisms may be present in drinking water, products resulting in the intentional introduction of microorganisms for the treatment of drinking water are excluded from the scope of NSF ANSI CAN 60.
1.3 Normative references
The following documents contain requirements, which by reference in this text, constitute requirements of NSF ANSI CAN 60. At the time NSF ANSI CAN 60this Standard was balloted, the editions listed below were valid. All documents are subject to revision, and parties are encouraged to investigate the possibility of applying the recent editions of the documents indicated below. The most recent published edition of the document shall be used for undated references.
21 CFR Part 58, Good Laboratory Practice for Non-Clinical Laboratory Studies
40 CFR Part 160, Good Laboratory Practice Standards
40 CFR Part 798, Health Effects Testing Guidelines
1.4 Alternate chemicals
Chemicals or mixtures of chemicals used for the various purposes discussed in this Standard, but not specifically referenced, shall be acceptable provided they meet the requirements of this Standard.
1.5 Significant figures and rounding
When determining conformance with the specifications in this Standard, the Absolute Method in ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance With Specifications shall be used. When rounding data, the Rounding Procedure in Section 6.4 of ASTM E29 shall be used.
2 Definitions
2.1 analytical summary: A list of the analytical procedures, both chemical and microbiological, which are selected to determine whether a product is compliant to the requirements of the Standard.
2.2 at-the-tap: Referring to the point of delivery of potable water.
2.3 blend: A treatment product composed of two or more individual chemicals that do not react with one another.
2.4 blender: A manufacturer who produces a physical mixture of two or more ingredients. The mixture may be further diluted with potable water.
NOTE — The definition of blender pertains to physical mixtures of ingredients, and not to chemical products that are produced by a chemical reaction in blended processes.NSF ANSI CAN 60 pdf download.