ASTM D5309-22 PDF

Full title and description

Standard Specification for Cyclohexane 999 — a concise ASTM specification that defines the required chemical and physical quality for the product grade identified as "cyclohexane 999," including purity, limits for key impurities, appearance, color and distillation characteristics.

Abstract

This specification covers a grade of cyclohexane identified as "cyclohexane 999." The material is required to meet minimum purity and maximum allowable concentrations for benzene, n-hexane, methylcyclohexane, methylcyclopentane and sulfur; it also specifies requirements for appearance, color and distillation range. Test methods and referenced practices for analysis, sampling and rounding are identified.

General information

• Status: Active / Published (current edition active in 2022).
• Publication date: 2022 — current edition approved September 1, 2022 (ASTM listing last updated September 9, 2022).
• Publisher: ASTM International (Committee D16; Subcommittee D16.01).
• ICS / categories: 71.080.10 (Aliphatic hydrocarbons).
• Edition / version: D5309-22.
• Number of pages: 2.

Scope

The standard applies to the specific commercial grade "cyclohexane 999." It prescribes how to determine conformance (including rounding rules per Practice E29), references required test methods and practices (for sampling, chromatography, color, distillation and sulfur determination), and reminds users to consult OSHA and supplier safety data sheets for safe handling.

Key topics and requirements

• Minimum purity: 99.90% (weight).
• Maximum benzene: 50 mg/kg.
• Maximum n-hexane: 200 mg/kg.
• Maximum methylcyclohexane: 200 mg/kg.
• Maximum methylcyclopentane: 150 mg/kg.
• Maximum total sulfur: 1 mg/kg.
• Appearance: free of haze, particulates or suspended matter (visual inspection).
• Maximum color (Platinum/Cobalt scale): 10 (with referenced color test methods).
• Distillation characteristic: specified distillation range with a reference temperature (distillation method D850).
• Referenced test methods and practices include D7266 and D7871 (gas chromatography analysis of cyclohexane), D8005/D5386 (color), D7183 (sulfur), D850 (distillation), D3437 (sampling), E29 (rounding/significant digits) and E2680 (appearance).

Typical use and users

Used by chemical manufacturers and refiners, quality-control and analytical laboratories, suppliers and purchasing departments, formulators and R&D groups that require a defined commercial grade of cyclohexane for industrial or laboratory use. Procurement, batch release and compliance checks commonly reference this specification to ensure product meets customer or process requirements.

Related standards

Key referenced ASTM methods and practices cited within D5309-22 include: D7266, D7871 (cyclohexane analysis by GC), D8005 and D5386 (color), D7183 (total sulfur), D850 (distillation), D3437 (sampling practice), E29 (significant digits/rounding), and E2680 (appearance). D5309 is maintained under Committee D16 and Subcommittee D16.01 (benzene, toluene, xylenes, cyclohexane and derivatives).

Keywords

cyclohexane; cyclohexane 999; ASTM D5309; purity; benzene limit; sulfur; distillation; color; gas chromatography; D7266; D7871.

FAQ

Q: What is this standard?

A: ASTM D5309-22 is the ASTM specification that defines the chemical and physical requirements for the commercial grade called "cyclohexane 999."

Q: What does it cover?

A: It covers minimum purity and maximum impurity limits (benzene, n-hexane, methylcyclohexane, methylcyclopentane, sulfur), appearance and color limits, and distillation range, and it references specific ASTM test methods and sampling/rounding practices for determining conformance.

Q: Who typically uses it?

A: Chemical producers, suppliers, buyers, analytical/QC laboratories, process chemists and R&D groups that need a standardized commercial feedstock or solvent grade of cyclohexane.

Q: Is it current or superseded?

A: The current version is D5309-22 (the 2022 edition). The document is listed as active and the current edition was approved in 2022 (current listing updated by ASTM in September 2022). Prior editions include D5309-17 and earlier versions.

Q: Is it part of a series?

A: It is maintained under ASTM Committee D16 (Aromatic, Industrial, Specialty and Related Chemicals) and Subcommittee D16.01 (Benzene, Toluene, Xylenes, Cyclohexane and Their Derivatives); related standards cover methods for analysis and testing of aromatics and cyclic hydrocarbons.

Q: What are the key keywords?

A: cyclohexane 999, purity, benzene limit, sulfur limit, distillation range, ASTM D5309, gas chromatography, color (Platinum/Cobalt).