ASTM D5871-24 PDF

Full title and description

Standard Specification for Benzene for Cyclohexane Feedstock — specification D5871-24 defines required quality and testable properties for benzene intended as feedstock to produce cyclohexane, including compositional limits and test methods for impurities and physical properties.

Abstract

This specification covers benzene for cyclohexane feedstock. It identifies the tests and limits used to determine benzene content and the levels of common impurities (sulfur, thiophene, toluene plus methylcyclohexane, methylcyclopentane, n‑hexane), as well as physical characteristics such as acid wash color, appearance, color, water content, and solidification point on an anhydrous basis. The standard also specifies rounding rules for conformance (Practice E29) and notes SI units as primary.

General information

• Status: Active.
• Publication date: October 1, 2024 (D5871-24).
• Publisher: ASTM International.
• ICS / categories: Analytical chemistry / organic chemicals — ICS codes shown with this document include 71.040.01 and 71.080.01.
• Edition / version: D5871-24 (current edition).
• Number of pages: 2.

Scope

The standard applies to benzene intended specifically for use as cyclohexane feedstock. It establishes required compositional and impurity limits and the associated test procedures required to demonstrate conformance, clarifies rounding practice for limits (Practice E29), designates SI units as the primary measurement system, and reminds users to consult applicable safety data and OSHA regulations when handling materials.

Key topics and requirements

• Specification of benzene purity and benzene content limits for cyclohexane feedstock.
• Limits and test procedures for sulfur and thiophene impurities.
• Limits for hydrocarbon impurities (toluene plus methylcyclohexane, methylcyclopentane, n‑hexane).
• Physical property checks: acid wash color, appearance, color, water content, and solidification point (anhydrous basis).
• Conformance and rounding instructions (use Practice E29 for rounding).
• Safety and regulatory reminder — consult current OSHA regulations and supplier Safety Data Sheets.

Typical use and users

This standard is used by chemical manufacturers and refineries that produce or purchase benzene for downstream hydrogenation to cyclohexane, quality control and analytical laboratories that test benzene feedstock, procurement/specifications teams at chemical producers, and regulatory or compliance personnel ensuring material meets feedstock specifications prior to processing.

Related standards

Referenced and related standards include ASTM Practice E29 (rounding and significant digits guidance) and other Committee D16 petroleum/organic-chemistry standards that cover test methods and specifications for hydrocarbon feedstocks. Earlier editions of this specification (for example D5871-19) are superseded by the 2024 edition.

Keywords

benzene, cyclohexane feedstock, benzene content, sulfur, thiophene, toluene, methylcyclohexane, methylcyclopentane, n‑hexane, acid wash color, solidification point, ASTM D5871-24.

FAQ

Q: What is this standard?

A: ASTM D5871-24 is the 2024 ASTM standard specification that sets compositional and quality requirements for benzene intended as feedstock to produce cyclohexane.

Q: What does it cover?

A: It covers the required tests and limits for benzene content, common impurities (sulfur, thiophene, certain hydrocarbons), physical properties (color, appearance, water content, solidification point), rounding rules for limit verification, and safety/regulatory reminders.

Q: Who typically uses it?

A: Producers and purchasers of benzene for cyclohexane production, refinery and chemical plant QC labs, procurement/spec teams, and compliance staff.

Q: Is it current or superseded?

A: D5871-24 is the current (active) edition published in 2024; it supersedes earlier editions such as D5871-19. Users should verify status before purchase or use.

Q: Is it part of a series?

A: Yes — it is an ASTM D-series specification developed under Committee D16 (petroleum products, liquid fuels, and lubricants) and appears in the ASTM Book of Standards volume covering related organic-chemistry and analytical standards.

Q: What are the key keywords?

A: Benzene, cyclohexane feedstock, purity, sulfur, thiophene, acid wash color, solidification point, ASTM D5871-24.