ASTM D8613-25 PDF

Full title and description

ASTM D8613-25 — Standard Specification for Liquefied Petroleum Gases and Gas Mixtures Intended for Use in Herbal Extraction and Refinement Applications. This specification establishes minimum composition, allowable contaminants, test methods, and cylinder/handling requirements for refined LPG solvents and gas blends used specifically in herbal and botanical extraction processes (including hemp/cannabis extraction) to help ensure product quality and reduce health and safety risks for end products and operators.

Abstract

This standard defines chemical and impurity limits, analytical verification methods, and storage/filling assembly requirements for liquefied petroleum gases and gas mixtures marketed or used as extraction solvents in herbal refinement. It emphasizes control of trace contaminants (for example benzene and total BTEX), specification of minimum hydrocarbon concentration for extraction-grade streams, and appropriate sampling and testing protocols to confirm conformance. The document also notes that it does not replace safety procedures or regulatory obligations, and users must adopt appropriate safety, health, and environmental practices.

General information

• Status: Active.
• Publication date: July 1, 2025 (designated D8613-25).
• Publisher: ASTM International.
• ICS / categories: 75.160.30 (Gaseous fuels; LPG and related test methods).
• Edition / version: Edition 2025, designation D8613-25.
• Number of pages: 5 pages.

Scope

The standard covers refined liquefied petroleum gases and gas mixtures intended for use in herbal extraction and refinement. It specifies minimum hydrocarbon concentration requirements, maximum allowable levels for key contaminants (including aromatic hydrocarbons and certain sulfur or oxygenated impurities), required test methods for verification, and requirements for cylinder assembly and marking for products supplied as extraction solvents. It explicitly excludes raw or unrefined refinery streams and does not by itself address all operational safety or regulatory obligations for users.

Key topics and requirements

• Minimum hydrocarbon purity and compositional limits for extraction-grade LPG (e.g., specified limits for n‑butane, isobutane, propane where applicable).
• Strict limits on contaminants and toxic trace compounds such as benzene and total BTEX, plus guidance thresholds for alcohols, sulfur compounds, water, and non‑volatile residues.
• Required analytical and test methods for verification (GC-based compositional analysis, residue testing, and other targeted methods).
• Sampling, cylinder assembly, labeling, and storage recommendations for safe supply and traceability of extraction solvents.
• Notes on limitations: the standard does not replace workplace safety standards and advises users to implement appropriate safety and environmental controls.

Typical use and users

Primary users are suppliers and manufacturers of extraction-grade LPG solvents, botanical and cannabis/hemp extract processors, third‑party analytical laboratories performing purity and contaminant testing, quality managers in formulation and product safety, and regulatory or compliance personnel evaluating solvent specifications. The standard is intended to support product specification, purchasing decisions, supplier qualification, and laboratory confirmation testing in extraction and refinement workflows.

Related standards

Standards commonly referenced with or relevant to D8613-25 include: ASTM D1835 (Standard Specification for Liquefied Petroleum (LP) Gases) for general LPG product definitions and properties; ASTM D6897 (Vapor Pressure of LPG) and other D02 methods for physical property testing; ASTM D1265 (Sampling of LPG) for representative sampling procedures; and analytical methods addressing trace organics and residues (including industry GC methods and related test methods). Some test methods for residue and trace BTEX analysis (historical and vendor standards) are also used in support of compliance testing.

Keywords

liquefied petroleum gas, LPG, extraction-grade solvent, butane, isobutane, propane, benzene, BTEX, contaminants, residue, herbal extraction, cannabis, hemp, analytical testing, sampling, cylinder assembly, D8613-25.

FAQ

Q: What is this standard?

A: ASTM D8613-25 is a 2025 ASTM International specification that defines composition, contaminant limits, test methods, and cylinder/handling requirements for liquefied petroleum gases and gas mixtures intended specifically for herbal extraction and refinement applications.

Q: What does it cover?

A: It covers refined LPG solvents and gas mixtures used as extraction solvents, setting minimum purity and maximum contaminant thresholds (including benzene/BTEX and other specified impurities), required analytical verification approaches, and requirements for cylinder filling and identification. It excludes raw/unrefined refinery streams and does not replace workplace safety rules.

Q: Who typically uses it?

A: Solvent producers and distributors, botanical and cannabis/hemp extraction operations, analytical laboratories, product quality and regulatory teams, and safety/compliance officers who need to specify or verify extraction‑grade LPGs.

Q: Is it current or superseded?

A: As published in 2025 the designation D8613-25 is listed as active (current). Users should check periodically with ASTM or authorized distributors for any corrigenda, revisions, or updates.

Q: Is it part of a series?

A: It sits alongside other ASTM LPG and hydrocarbon standards (for example D1835 for general LPG specifications and numerous D02 test methods for sampling and property determination). It was developed within relevant ASTM committees addressing gaseous fuels and extraction-grade solvent quality.

Q: What are the key keywords?

A: Key terms include liquefied petroleum gas, extraction-grade, butane, isobutane, propane, benzene, BTEX, contaminants, residue, sampling, analytical testing, and herbal/cannabis extraction.