GB/T 683-2006Chemical reagents -- Methanol (English PDF)

Foreword

This Standard is not equivalent to ISO 6353-2.1983 "Reagents for chemical analysis --

Part 2.Specifications -- First series".

This Standard replaces GB/T 683-1993 "Chemical reagents. Methanol". Compared

with GB/T 683-1993, the main changes are as follows.

- The water solubility test has been changed to the water mixing test (3.3 and 4.3.1

of Edition 1993; Chapter 4 and 5.4 of this Edition);

- The units for acidity and alkalinity have been adjusted from mmol/100 g to mmol/g,

and the determination methods have been improved (3.3, 4.3.4, and 4.3.5 of

Edition 1993; Chapter 4, 5.7, and 5.8 of this Edition);

- The specification for reducing potassium permanganate has been changed from

qualified to no more than 0.0005%, and the storage time has been adjusted (3.3

and 4.3.8 of Edition 1993; Chapter 4 and 5.11 in this Edition).

This Standard was proposed by China Petroleum and Chemical Industry Association.

This Standard shall be under the jurisdiction of Subcommittee on Chemical Reagents

of National Technical Committee on Chemical of Standardization Administration of

China (SAC/TC 63/SC 3).

The drafting organizations of this Standard. Sinopharm Chemical Reagent Co., Ltd.

Main drafters of this Standard. Chen Haoyun, Chen Hong.

This Standard was first published in 1965.It was first revised in 1979 and revised a

second time in 1993.

Chemical reagent -- Methanol

WARNING -- Some of the testing procedures specified in the standard may lead

to dangerous situations, and users are responsible for taking appropriate safety

and health precautions.

Indicative formula. CH3OH

Relative molecular mass star. 32.04 (based on the 2003 international relative atomic

mass)

1 Scope

This Standard specifies the properties, specifications, test, inspection rules, packaging,

and marking of methanol, a chemical reagent.

This Standard applies to the testing of methanol, a chemical reagent.

2 Normative references

The provisions in following documents become the provisions of this Standard through

reference in this Standard. For dated references, the subsequent amendments (excluding

corrigendum) or revisions do not apply to this Standard, however, parties who reach an

agreement based on this Standard are encouraged to study if the latest versions of these

documents are applicable. For undated references, the latest edition of the referenced

document applies.

GB/T 601, Chemical reagent -- Preparations of reference titration solutions

GB/T 602, Chemical reagent -- Preparations of standard solutions for impurity

(GB/T 602-2002, ISO 6353-1.1982, NEQ)

GB/T 603, Chemical reagent -- Preparations of reagent solutions for use in test

methods (GB/T 603-2002, ISO 6353-1.1982, NEQ)

GB/T 606, Chemical reagent -- General method for the determination of water --

Karl Fischer method (GB/T 606-2003, ISO 6353-1.1982, NEQ)

GB/T 611-2006, Chemical reagent -- General method for the determination of

density (ISO 6353-1.1982, NEQ)

GB/T 6682, Water for analytical laboratory use -- Specification and test methods

(GB/T 6682-1992, eqv ISO 3696.1987)

GB/T 9722-2006, Chemical reagent -- General rules for the gas chromatography

GB/T 9733, Chemical reagent -- General method for the determination of carbonyl

compounds (GB/T 9733-1988, eqv ISO 6353-1.1982)

GB/T 9736-1988, Chemical reagent -- General method for the determination of

acidity and alkalinity (eqv ISO 6353-1.1982)

GB/ T 9737, Chemical reagent -- General rules for the measurement of readily

carbonizable substances (GB/T 9737-1988, eqv ISO 6353-1.1982)

GB/T 9740, Chemical reagent -- General method for the determination of dry

residue after evaporation (GB/T 9740-1988, eqv ISO 6353-1.1982)

GB 15258, General rules for preparation of precautionary label for chemicals

GB 15346, Chemical reagent -- Packaging and marking

HG/T 3921, Chemical reagent. Regulations for sampling and acceptance

3 Properties

This reagent is a colorless and transparent liquid that is miscible with water, alcohol,

ether, etc.

4 Specifications

The specifications for methanol are shown in Table 1.

5 Test