GOST 4233-77 PDF

Full title and description

GOST 4233-77 — "Reagents. Sodium chloride. Specifications" (Russian: "Реактивы. Натрий хлористый. Технические условия"). The standard establishes technical requirements, acceptance rules and methods of analysis for sodium chloride when supplied as a chemical reagent.

Abstract

A technical specification originally adopted in 1977 (effective 1 January 1978) that defines reagent-grade sodium chloride (NaCl) characteristics, required analytical methods for quality control, packing, marking, transportation and storage. It is used to ensure consistency and traceability of NaCl supplied for analytical, laboratory and certain industrial uses.

General information

• Status: In force / active (standard maintained with subsequent amendments and clarifications).
• Publication date: Adopted 1977; date of introduction into force 1 January 1978.
• Publisher: Approved by Gosstandart of the USSR (State Committee for Standards).
• ICS / categories: Chemical industry — Analytical chemistry / Chemical reagents (classification area approx. 71.040.30).
• Edition / version: Original designation GOST 4233-77 (with recorded amendments noted in databases, e.g. amendments in 1987 and 1992).
• Number of pages: Approximately 20 pages (typical document length in commercial standard listings).

Scope

The standard applies to sodium chloride that is supplied as a reagent and describes its acceptable physical form (crystals or crystalline powder), required purity/quality characteristics for reagent use, sampling and analytical procedures, rules for acceptance, and requirements for packaging, marking, transport and storage. It is intended for manufacturers, suppliers and laboratories that handle NaCl for analytical and related purposes.

Key topics and requirements

• Designation and definitions for reagent-grade sodium chloride (physical form and basic description).
• Technical requirements covering purity parameters, limits for specified impurities and permissible deviations for reagent use.
• Sampling and methods of chemical analysis to verify conformity with the standard.
• Rules for acceptance, documentation and quality control procedures.
• Requirements for packaging, labeling, transportation and storage to preserve reagent quality.

Typical use and users

Used by chemical reagent manufacturers, analytical and testing laboratories, educational and research institutions, pharmaceutical quality control, and industrial users requiring standardized reagent-grade NaCl for analytical methods, calibrations and laboratory procedures.

Related standards

GOST 4233-77 is part of the suite of GOST documents addressing chemical reagents and analytical chemistry. Related or nearby GOSTs cover reagent specifications for other common inorganic salts, water for analysis and methods of chemical analysis; commercial listings of related standards include several reagent and analytical GOST references.

Keywords

GOST 4233-77, sodium chloride, NaCl, reagent, technical conditions, reagent-grade salt, analytical chemistry, Gosstandart.

FAQ

Q: What is this standard?

A: A GOST (Soviet / Russian national) technical standard specifying requirements and test methods for sodium chloride supplied as a chemical reagent.

Q: What does it cover?

A: Physical description of the reagent, required chemical/impurity limits for reagent use, sampling and analysis methods, acceptance rules, and packaging/marking/transport/storage requirements.

Q: Who typically uses it?

A: Laboratories, reagent manufacturers and suppliers, pharmaceutical and educational institutions, and any user needing standardized reagent-grade sodium chloride for analytical or laboratory applications.

Q: Is it current or superseded?

A: The standard GOST 4233-77 was adopted in 1977 and introduced 1 January 1978; commercial and regulatory databases list it as maintained/in force with later amendments recorded (examples include amendments noted in 1987 and 1992). Users should verify the latest amendment status in an official standards registry before relying on the text for compliance.

Q: Is it part of a series?

A: Yes — it belongs to the body of GOST documents that govern chemical reagents and analytical methods; it complements other reagent-specific GOSTs and analytical standards used together for laboratory quality assurance.

Q: What are the key keywords?

A: Sodium chloride, NaCl, reagent, technical conditions, reagent-grade, analytical chemistry, GOST 4233-77, Gosstandart.