ASTM D8178-25 PDF

Full title and description

ASTM D8178-25 — Standard Terminology Relating to Recovered Carbon Black (rCB). This concise terminology standard compiles definitions of technical terms used in the recovered carbon black industry to support consistent communication among producers, testers, compounders, and regulators.

Abstract

This standard provides a focused set of definitions for terms specific to recovered carbon black (rCB), including core product descriptors (for example, rCB, feedstock, pyrolysis char, ash) and related vocabulary needed for testing, classification, and specification of rCB products. It excludes terms that are already well defined in other readily available sources.

General information

• Status: Active (current as of February 21, 2026).
• Publication date: 1 June 2025 (designated D8178-25).
• Publisher: ASTM International.
• ICS / categories: 01.040.71; 71.060.10 (chemical technology; chemical elements / vocabularies).
• Edition / version: D8178-25 (current edition).
• Number of pages: 2 pages.

Scope

This terminology covers a compilation of definitions of technical terms used in the recovered carbon black industry. Terms that are generally understood or adequately defined in other readily available sources are intentionally not included. The standard was developed under ASTM Committee D36 and follows internationally recognized principles for standards development.

Key topics and requirements

• Authoritative definitions for recovered carbon black (rCB) and closely related terms (e.g., feedstock, pyrolysis char, engineered rCB, ash, inorganic content).
• Clarifies distinctions between rCB and conventional carbon black (e.g., differences in origin and composition).
• Terminology intended to support uniform reporting, test-method selection, classification, and specification of rCB materials.
• Reference point for other ASTM rCB standards and test methods (terminology used across D36 rCB standards).

Typical use and users

Used by testing laboratories, rCB and carbon-black manufacturers, recyclers and pyrolysis operators, rubber compounders, materials engineers, standards writers, and regulatory/compliance personnel who need consistent definitions when specifying, testing, classifying, or reporting on recovered carbon black.

Related standards

Typical related ASTM documents used together with D8178 include (selection): D8644 (sample reduction, blending, drying of rCB samples), D8632 (classification for rCB used in rubber products), D8621 (ash content test methods for rCB), D8466 (guide to carbon-black test methods applicable to rCB), and a range of traditional carbon black test methods recognized for rCB use. These linked standards and guides help translate terminology into test practice and classification schemes.

Keywords

recovered carbon black; rCB; terminology; ash; feedstock; pyrolysis; classification; ASTM D8178-25.

FAQ

Q: What is this standard?

A: ASTM D8178-25 is a short terminology standard titled "Standard Terminology Relating to Recovered Carbon Black (rCB)" that defines key terms used in the rCB industry to ensure consistent language across testing, classification, and specification.

Q: What does it cover?

A: It covers a curated set of definitions for technical terms specific to recovered carbon black and explicitly excludes terms already well defined in other sources; it provides the vocabulary foundation for rCB test methods and classifications.

Q: Who typically uses it?

A: Laboratories, rCB producers and processors, rubber compounders and manufacturers, standards developers, and regulatory or procurement professionals who need clear, consistent definitions for rCB-related activities and documentation.

Q: Is it current or superseded?

A: The D8178-25 edition was published 1 June 2025 and is listed as active/current (it supersedes earlier D8178 editions). The status stated here is current as of February 21, 2026.

Q: Is it part of a series?

A: Yes — D8178 is a terminology reference within the suite of ASTM Committee D36 recovered carbon black standards and is commonly used together with practice, test method, and classification standards (for example D8644, D8632, D8621, and related guides and carbon black test methods).

Q: What are the key keywords?

A: Recovered carbon black (rCB), ash, feedstock, pyrolysis char, engineered rCB, terminology, classification, ASTM D8178-25.