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AWWA B303-24 Sodium Chlorite, 2024
- Foreword [Go to Page]
- I. Introduction. [Go to Page]
- I.A. Background. Sodium chlorite, NaClO2, is made by the partial reduction of sodium chlorate to chlorine dioxide and the chlorine dioxide’s subsequent conversion to sodium chlorite in an alkaline solution in the presence of hydrogen peroxide. An excess o [Go to Page]
- I.C. Acceptance. In May 1985, USEPA entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct and indirect drinking water additives. Ot
- I.B. History. The original ANSI/AWWA Standard for Sodium Chlorite was prepared by Committee 7440P. The standard was approved as tentative on Jan. 25, 1965, and made a standard by the AWWA Board of Directors on June 1, 1967. The standard was designated ANS
- II. Special Issues. [Go to Page]
- II.A. Handling, Storage, and Safety Precautions. Aqueous sodium chlorite solution is shipped in stainless-steel and fiberglass tank trucks according to DOT regulations. The temperature in the tanks is maintained to avoid crystallization. On receipt, the p
- III. Use of This Standard. It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. [Go to Page]
- III.A. Purchaser Options and Alternatives. The following information should be provided by the purchaser. [Go to Page]
- III.B Modification to Standard. Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser. [Go to Page]
- IV. Major Revisions. Major changes made to the standard in this revision include the following:
- V. Comments. If you have any comments or questions about this standard, please call AWWA Engineering and Technical Services at 303.794.7711; write to the department at 6666 West Quincy Avenue, Denver, CO 80235-3098; or e-mail at standards@awwa.org.
- AWWA Standard
- SECTION 1: GENERAL
- Sec. 1.1 Scope
- Sec. 1.2 Purpose
- Sec. 1.3 Application
- SECTION 2: REFERENCES
- SECTION 3: DEFINITIONS
- SECTION 4: REQUIREMENTS
- Sec. 4.1 Physical Requirements
- Sec. 4.2 Chemical Requirements
- Sec. 4.3 Impurities*
- SECTION 5: VERIFICATION
- Sec. 5.1 Sampling
- Sec. 5.2 Test Procedures—General
- Sec. 5.3 Test Procedures for Sodium Chlorite, Iodometric Method
- Sec. 5.4 Test Procedure for Sodium Hydroxide
- Sec. 5.5 Test Procedure for Sodium Carbonate
- Sec. 5.6 Test Procedure for Sodium Chloride
- Sec. 5.7 Test Procedure for Sodium Sulfate
- Sec. 5.8 Test Procedure for Arsenic
- Sec. 5.9 Test Procedure for Sodium Nitrate
- Sec. 5.10 Test Procedure for Sodium Chlorate
- Sec. 5.11 Test Procedure for Sodium Chlorate—Alternative Method
- Sec. 5.12 Notice of Nonconformance
- SECTION 6: DELIVERY
- Sec. 6.1 Marking*
- Sec. 6.2 Packaging and Shipping
- Sec. 6.3 Affidavit of Compliance or Certified Analysis [Go to Page]
