GOST 6709-72 PDF

Full title and description

GOST 6709-72 — "Вода дистиллированная. Технические условия" (Distilled water. Specifications). Soviet-era national standard that defines quality, composition limits and test methods for distilled water intended for analytical work and preparation of reagent solutions.

Abstract

GOST 6709-72 specifies physical and chemical requirements, limit values for residual solids, selected ions and metals, pH range and electrical conductivity, plus sampling and test procedures for distilled water produced by distillation apparatus. The standard was prepared for laboratories, reagent production and analytical applications where high-purity distilled water is required.

General information

• Status: Not in force as a current Russian national standard (the application as an RF national standard has been discontinued / withdrawn; shown as ended 01 July 2021 in national registries).
• Publication date: Adopted 1972 (approved by Gosstandart USSR 29 June 1972); date of entry into force 01 January 1974.
• Publisher: Gosstandart of the USSR (State Committee for Standards); later reprints and collections published by standards publishers (Standartinform / IPK).
• ICS / categories: Chemical industry / Analytical chemistry / Chemical reagents (OKS/ICS classification around 71.040.30).
• Edition / version: Original designation GOST 6709-72 (1972). Later reprints/editions and editorial updates appear in collections (not a modern revision published as a new GOST after 1972).
• Number of pages: Typical printed copy / reprint: approximately 10–20 pages (most GOST technical specifications of this type are short-form documents; available electronic copies and reproductions generally fall within this range).

Scope

The standard applies to distilled water obtained in distillation (boiling/condensing) apparatus and intended for use in chemical analysis, preparation of reagent solutions and other laboratory and technical tasks requiring distilled water of defined purity. It specifies which quality parameters must be met for the water to be considered compliant.

Key topics and requirements

• Definitions and general properties of distilled water (transparent, colorless, odorless, H2O basis).
• Maximum mass concentration of residue after evaporation: not more than 5 mg/dm³.
• Strict ion and metal limits: e.g., NH4 (as ammonia/ammonium) ≤ 0.02 mg/dm³; nitrates ≤ 0.2 mg/dm³; sulfates ≤ 0.5 mg/dm³; chlorides ≤ 0.02 mg/dm³; Al, Fe ≤ 0.05 mg/dm³; Ca ≤ 0.8 mg/dm³; Cu ≤ 0.02 mg/dm³; Zn ≤ 0.2 mg/dm³; Pb ≤ 0.05 mg/dm³ (values as specified in the standard).
• Limits for reducing substances (as KMnO4 demand) and other specific indicators (example: O ≤ 0.08 mg/dm³ in the cited table).
• pH requirement: typically 5.4–6.6.
• Maximum specific electrical conductivity at 20 °C: not more than 5 × 10⁻⁴ S/m (as given in the standard's tabulated requirements or subsequent editorial changes).
• Sampling, preparation of reagent-grade distilled water for specific tests (procedures to remove ammonia, acidifying first distillate fractions, apparatus descriptions) and prescribed analytical methods for verification.

Typical use and users

Primary users are analytical and testing laboratories, reagent manufacturers, chemical industry quality-control units and educational/research institutions that require distilled water meeting defined purity limits for analytical work, preparation of standard solutions and sensitive chemical procedures. Industrial users producing and selling distilled water for technical purposes may reference the standard for product descriptions, though other modern national standards may now apply in specific countries.

Related standards

GOST 6709-72 replaced earlier GOSTs on distilled water (for example GOST 6709-53 as earlier designation) and is listed with many normative references to laboratory-method GOSTs (e.g., standards on reagents, apparatus and analytical methods). For current practice in the Russian Federation, later national standards (for example standards published under the GOST R system such as those addressing laboratory reagent water) are recommended where GOST 6709-72 has been withdrawn; registries indicate GOST R 58144-2018 and other more recent normative documents as references for reagent/ultrapure water regimes.

Keywords

GOST 6709-72, distilled water, reagent water, specifications, laboratory water, pH, conductivity, residue, analytical chemistry, ГОСТ, USSR standard

FAQ

Q: What is this standard?

A: GOST 6709-72 is a Soviet-era technical specification titled "Вода дистиллированная. Технические условия" (Distilled water. Specifications) that defines quality parameters and test methods for distilled water used in analytical and reagent preparation contexts.

Q: What does it cover?

A: It covers physical and chemical quality limits (residual dry residue, selected ion and metal concentrations), pH and conductivity limits, sampling and test procedures, and instructions for preparing distilled water free of specific impurities for analytical use.

Q: Who typically uses it?

A: Analytical laboratories, reagent manufacturers, chemical industry QC departments and research institutions that need standardized distilled water quality for analysis and preparation of reagent solutions. Industrial suppliers sometimes reference the standard when marketing distilled water intended for laboratory or technical uses.

Q: Is it current or superseded?

A: GOST 6709-72 is shown in Russian registries as no longer in force for the Russian Federation (the documented end of validity is recorded as 01 July 2021). Users in the RF and successor jurisdictions should check for and apply current national standards or technical regulations (examples cited in registries include modern GOST R documents for reagent water). Always verify the currently accepted national standard in the target country before relying on this 1972 standard.

Q: Is it part of a series?

A: It is part of the body of GOST standards related to chemical reagents and laboratory methods; normative references within the document point to many other GOSTs on reagents, apparatus and analytical procedures. Historically it followed earlier distilled-water standards and sits among standards for reagents and laboratory materials.

Q: What are the key keywords?

A: Distilled water; reagent water; purity; residue after evaporation; specific ions (NH4, NO3, SO4, Cl); metals (Al, Fe, Cu, Pb, Zn); pH; conductivity; analytical chemistry; ГОСТ 6709-72.