| Assay: 99%
|| Package: 25kg/drum
|| MOQ: 1kg
The quality index of 1,2-hexanediol is shown in Table 1
Table 1 Quality indicators
Appearance Colorless transparent or slightly yellowish liquid
Purity, % ≥99.0
Moisture, % ≤0.50
Refractive index 1.4315-1.4475
Relative density 0.945-0.955
4 Test methods
In accordance with the 2010 edition of the Chinese Pharmacopoeia Appendix IX A solution color inspection method.
4.2 Purity test
4.2.1 Inspection equipment
GC9790 gas chromatograph, manufactured by Zhejiang Fuli Analytical Instrument Co., Ltd.
4.2.2 Analysis Conditions
a) Chromatographic column: capillary column (0.32mm*30m, 1um) RTX-1701;
b) Column temperature: 150℃
c) Vaporization temperature: 240℃;
d) Detector temperature: 250℃;
e) H2 pressure: 0.1Mpa;
f) N2 pressure: 0.06Mpa;
g) Air pressure: 0.03Mpa;
h) Injection volume: 0.10ul;
i) FID detector.
4.2.3 Inspection method
According to the ZBBZH/ZY/2-2010 edition of the Pharmacopoeia of the People's Republic of China, Part II (2010 edition), Appendix Ⅴ E Gas chromatographic area normalization method
CAS: 6920-22-5 Molecular formula: C6H14O2; Molecular weight: 118.18
4.3.1 Inspection equipment
KF-1 Moisture Analyzer.
4.3.2 Inspection method
According to ZBBZH/ZY/2-2010 edition of the People's Republic of China Pharmacopoeia II (2010 edition) appendix VIII M moisture determination method for quantitative inspection.
Some of the test procedures specified in the test method may lead to hazardous situations, and the operator should take appropriate safety and protective measures.
4.4 Determination of Refractive Index
4.4.1 Inspection equipment
Apparatus: 2WA-J Abbe refractometer.
4.4.2 Inspection method
According to the 2000 Chinese Pharmacopoeia Appendix VIF Refractive Index Determination Method.
4.5 Relative Density
4.5.1 Inspection equipment
4.5.2 Inspection method
According to the 2000 Chinese Pharmacopoeia Appendix VIA relative density determination method.
5 Inspection Rules
5.1 Factory inspection
1,2-Hexanediol shall be inspected by the product quality inspection department of the manufacturer according to the requirements of this standard. Each batch of products shipped from the factory is accompanied by an inspection certificate before leaving the factory. The factory inspection should be
All items specified in this standard.
When 1,2-Hexanediol is batched, it can be carried out according to the contract stipulated by both parties. If there is no contract stipulation, the products produced in one batch will be regarded as a batch;
Several identical production batches are mixed evenly to form an inspection batch.
Sampling is carried out in accordance with the provisions of GB/T 6680-2003 General Rules for Sampling of Liquid Chemical Products. The sample should not be less than 500 grams, and the sample should be mixed evenly and then packed in two dry and clean containers.
In the grinding-mouth bottle, the sample bottle should be marked: product name, batch number, sampling time, name of the sampler, one bottle for inspection, and one bottle sealed for future reference. The packaging and storage of the samples shall be in accordance with the
The packaging and storage of the ex-factory products are consistent.
5.4 Judgment Rules
5.4.1 If one of the indicators in the inspection results does not meet the requirements of this standard, the sealed samples should be taken for re-inspection. If the re-inspection is qualified, the batch of products will be judged as qualified products. The retest results are still
If there is one index that does not meet the requirements of this standard, the batch of products will be judged as unqualified products.
5.4.2 If the inspection results of all inspection items meet the requirements of this standard, the batch of products will be judged as qualified.
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