GB/T 23799-2021

Methanol gasoline (M85) for motor vehicles (English Version)

Standard No.

GB/T 23799-2021

Language

Chinese, Available in English version

Release Date

2021

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 23799-2021

Replace

GB/T 23799-2009

Scope

This document specifies the requirements and test methods for methanol gasoline C (M85) blended from 82 to 86% (volume fraction) methanol, motor gasoline and additives to improve performance. Inspection rules, signs, Packaging, transportation and storage and safety. This document is applicable to the fuel used in vehicle methanol gasoline C (M85) ignition engine vehicles.

Introduction

Core changes in the standard revision

Technical parameters	Requirements of the 2009 version	Requirements of the 2021 version	Impact of changes
Methanol content	Methanol + polyols (C2-C8) items	Methanol volume fraction 82%-86%	Simplified detection indicators, added ASTM D7920 test method
Sulfur content	≤80mg/kg	≤5mg/kg	Environmental protection requirements have been improved, and the arbitration method has been changed to GB/T 34100
Vapor pressure	≤78kPa in winter ≤68kPa in summer	45-78kPa in winter 40-65kPa in summer	Set the lower limit to ensure low temperature startability
New items	-	Copper sheet corrosion ≤Level 1 Inorganic chlorine content ≤1mg/kg	Strengthen material compatibility testing

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Analysis of key technical requirements

1. Component control

The standard clearly prohibits the addition of methylal, polyols and other substances, and requires that the methanol purity be ≥99.9%. Comparison of key indicators:

• Manganese content: reduced from ≤2.9mg/L to ≤2mg/L
• Water content: New ASTM D7923 test method, requiring ≤0.5%
• Dye addition: Clearly use Candle red (Sudan IV) 8-10mg/kg

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Test method upgrade

1. Determination of methanol content (Appendix A)

Dual-column gas chromatography:

1. Polar TCEP column to separate hydrocarbons and oxygen-containing compounds
2. Non-polar WCOT column to analyze methanol and internal standard (tert-amyl alcohol)
3. Detection limit of 0.01% volume fraction

2. Inorganic chlorine detection (Appendix B)

Innovative use of potentiometric titration method:

Chlorine content range	Detection scheme	Precision
≥4mg/kg	Direct titration method	±0.2mg/kg
<4mg/kg	Standard addition method	±0.1mg/kg

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Implementation suggestions

Special requirements for storage and transportation

• Container material: Unprotected aluminum and butyl rubber hoses are prohibited
• Breathing valve: Storage tanks must be equipped with desiccant breathing valves
• Sampling specifications: Brown glass containers must be used to avoid metal contamination

Safety protection measures

Compile chemical safety data sheets in accordance with GB/T 17519, focusing on the following precautions:

1. Neurological toxicity and risk of blindness caused by methanol vapor
2. In case of fire, use alcohol-resistant foam fire extinguishing agent
3. Immediately rinse with water for 15 minutes after skin contact

GB/T 23799-2021 Referenced Document

• ASTM D1613 Standard Test Method for Acidity in Volatile Solvents and Chemical Intermediates Used in Paint, Varnish, Lacquer, and Related Products
• ASTM D4626 Standard Practice for Calculation of Gas Chromatographic Response Factors
• ASTM D5059 Standard Test Methods for Lead in Gasoline by X-Ray Spectroscopy
• ASTM D512 Standard Test Methods for Chloride Ion In Water
• ASTM D7328 Standard Test Method for Determination of Existent and Potential Inorganic Sulfate and Total Inorganic Chloride in Fuel Ethanol by Ion Chromatography Using Aqueous Sample Injection*， 2023-03-01 Update
• ASTM D7920 Standard Test Method for Determination of Fuel Methanol (M99) and Methanol Fuel Blends (M10 to M99) by Gas Chromatography
• ASTM D7923 Standard Test Method for Water in Ethanol and Hydrocarbon Blends by Karl Fischer Titration
• ASTM E203 Standard Test Method for Water Using Volumetric Karl Fischer Titration
• GB 12268 List of dangerous goods*， 2025-03-28 Update
• GB 13690 General rule for classification and hazard communication of chemicals
• GB 17930 Gasoline for motor vehicles
• GB 190 Packing symbol of dangerous goods
• GB 19592 Detergent additive for motor gasoline
• GB 30000.7 Rules for classification and labelling of chemicals.Part 7:Flammable liquids
• GB/T 11140 Standard test method for sulfur in petroleum products by wavelength dispersive X-ray fluorescence spectrometry
• GB/T 17476 Determination of Multiple Elements in Lubricating Oils and Base Oils by Inductively Coupled Plasma Emission Spectrometry*， 2023-05-23 Update
• GB/T 17519 Guidance on the compilation of safety data sheet for chemical products
• GB/T 23799 Methanol gasoline (M85) for motor vehicles
• GB/T 34100 Test method for determination of total sulfur in light hydrocarbons，spark ignition engine fuel ,diesel engine fuel, and engine oil—Ultraviolet fluorescence method
• GB/T 4756 Method for manual sampling of petroleum liquids
• GB/T 5096 Test method for corrosiveness to copper from petroleum products by copper strip test
• GB/T 511 Petroleum,petroleum products and additives.Method for determination of machanical admixtures
• GB/T 6283 Chemical products.Determination of water Karl.fischer method(general method)
• GB/T 6682 Water for analytical laboratory use.Specification and test methods
• GB/T 8019 Determination of Gum Content in Fuels by Jet Evaporation
• GB/T 8020 Determination of Lead Content in Gasoline by Atomic Absorption Spectrometry
• NB/SH/T 0164 Rules for packaging, storage, transportation and delivery acceptance of petroleum and related products
• NB/SH/T 0711 Determination of Manganese Content in Gasoline by Atomic Absorption Spectrometry
• SH/T 0253 Determination of total sulfur content in light petroleum products (electrical method)
• SH/T 0794 Standard test method for vapor pressure of petroleum products (mini method)

GB/T 23799-2021 history

• 2021 GB/T 23799-2021 Methanol gasoline (M85) for motor vehicles
• 2009 GB/T 23799-2009 Methanol gasoline(M85)for motor vehicles