ASTM E346 - 08

    Standard Test Method for Analysis of Methanol

    Active Standard ASTM E346 | Developed by Subcommittee: E15.02

    Book of Standards Volume: 15.05

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    ASTM E346

    Significance and Use

    These test methods are suitable for manufacturing control and for determining compliance with specification limits for the properties designated by the test methods. For those test methods that use the procedure given in other ASTM methods, those test methods should be consulted for additional information on the significance, use, and possible interferences.

    1. Scope

    1.1 These test methods cover chemical and physical tests for measuring the quality of methanol and appear in the following order:

    Purity of Reagents4
    Safety Precautions5
    Acidity7 to 9
    Carbonizables10 to 18
    Color19 to 21
    Distillation Range22 to 24
    Permanganate Time25 to 27
    Specific Gravity28 to 30
    Water31 to 33
    Water Miscibility34 to 37
    Ethanol37 to 47
    Acetone48 to 55
    Trimethylamine56 to 65

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.3 Review the current Material Safety Data Sheets (MSDS) for detailed information concerning toxicity, first aid procedures and safety precautions for the chemicals used in this standard.

    1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific hazards statements are given in Sections 5 and 15 and in 16.1, 16.4, and 52.2.2.

    10.1 This test method describes a procedure for detecting the presence of impurities in methanol that carbonize or darken in the presence of concentrated sulfuric acid. The test method is applicable to methanol having a carbonizables content in the range from 0 to 70 on the platinum-cobalt scale (see Test Method D 1209).

    37.1 This test method is applicable to methanol in which the ethanol content is between 0 and 1000 μg/g.

    48.1 This test method covers a procedure for detecting the presence of acetone in methyl alcohol (methanol) in amounts greater than 0.003 weight % mass (m/m) .

    56.1 This test method is used to determine the trimethylamine (TMA) content of refined methanol in the range of 10 to 100 μg/kg.

    56.2 The odor of methanol has been determined to be caused primarily by the impurity TMA. The determination of TMA and its relationship to odor will eliminate the need to sniff methanol to determined odor, avoiding exposure to this toxic chemical. Although TMA has been identified as the principal cause of odor, other compounds (amines, ethers) may contribute to odor.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D891 Test Methods for Specific Gravity, Apparent, of Liquid Industrial Chemicals

    D1078 Test Method for Distillation Range of Volatile Organic Liquids

    D1193 Specification for Reagent Water

    D1363 Test Method for Permanganate Time of Acetone and Methanol

    D1613 Test Method for Acidity in Volatile Solvents and Chemical Intermediates Used in Paint, Varnish, Lacquer, and Related Products

    D1722 Test Method for Water Miscibility of Water-Soluble Solvents

    E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals

    E203 Test Method for Water Using Volumetric Karl Fischer Titration

    E300 Practice for Sampling Industrial Chemicals

    E1140 Practice for Testing Nitrogen/Phosphorus Thermionic Ionization Detectors for Use In Gas Chromatography

    F1209 Guide for Ecological Considerations for the Use of Oil Spill Dispersants in Freshwater and Other Inland Environments, Ponds and Sloughs

    ICS Code

    ICS Number Code 71.080.60 (Alcohols. Ethers)

    UNSPSC Code

    UNSPSC Code 12352121(Organic hydroxides)

    DOI: 10.1520/E0346-08

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