GB/T 23668-2016 in English

VALID

2, 6-Dichloro-4-nitroaniline

Issued on:2016-12-30
Implemented on:2017-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 23668-2016
Document status:	VALID
Title in English:	2, 6-Dichloro-4-nitroaniline
Title in Chinese:	2,6-二氯-4-硝基苯胺
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2016-12-30
Implemented on:	2017-07-01
Superseding:	GB/T 23668-2009 2 6-Dichloro-4-nitroaniline
Chinese Classification:	G56-Dye intermediate
Professional Classification:	GB-National Standard
Related Keywords:	first-class products ≥94.00 first-class product ≥94.00 indicators 6-dichloro-4-nitroaniline introduction gb/t purity/ % first-class products ≥95.00 difference analysis quality fraction/ % first-class products ≥96.00
Related Topics:	Hexaphenyl ditin Dinitramine Bidiazole Ethylenediamine dinitrobenzene Chloraniline colorimetric method Trinitrodiphenylamine diphenylamine gb Nitrosodiphenylamine Nitrophenylhydrazine Dinitramine oxadiazole Tetrachlorodinitrotoluene Analysis method of dinitrobenzene Aniline standard Nitroaniline nitro o-dinitrobenzene p-dinitrobenzene detection GB/T 23668-2009 gb/t23668-2009 Diphenhydramine Aniline UV Diethylamine nitrate GB/T+23668-2009 Diphenylamine detection method Dichlorobenzene products Nitramine Diethylamine nitrate Dichlorobenzene Detection of dichlorobenzene nitrobenzeneliquidUV pex chloramine Dinitrophenylurea Three 4 aniline detection Liquid phase aniline Dinitrobenzenesulfuric acid Dinitrobenzene trap method p-Dinitrobenzene method Dinitrobenzene method monochloramine total chlorine diphenylamine use 2 4 dinitrophenylhydrazine method Chlorobenzene + dichlorobenzene water quality p-Nitrochlorobenzene Nitrobenzene, p-dinitrobenzene detection Analysis of diphenylamine Fluorochloroaniline Chlorodiphenylamine Ethylenediamine cobalt nitrate Anilinium chloride o-chloro-p-nitroaniline Diphenylamine detection Dinitrobenzene method Parachlorobiphenyl Chloroaniline in the air dichlorobenzene alcohol binary nitro compound Dinitropyrene Diphenylamine treatment Anilinium chloride Diphenylberyllium Diphenylamine Properties Diphenylamine content detection Hydroxylaminochlorobenzene GBT23668 GB/T 23668-2009 GB/T 23668-2016 Chloramine industry o-Chloronitroaniline

《GB/T 23668-20162,6-二氯-4-硝基苯胺》由TC134（全国染料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。

Introduction

GB/T 23668—2016 Interpretation of the Standard for 2,6-Dichloro-4-nitroaniline

I. Background of Standard Formulation and Analysis of Technical Evolution

GB/T 23668 is one of the important standards in China for the field of chemical reagents, which mainly regulates the quality requirements and test methods of 2,6-dichloro-4-nitroaniline (hereinafter referred to as "DCNPA"). This standard replaces the old version of GB/T 23668—2009, and has made technical improvements in the following aspects:

Indicator optimization:The mass fraction and purity control requirements of DCNPA have been improved.
New items:The test requirements for the mass fraction of ash have been added.
Method Update: The appearance evaluation method was improved and a more advanced liquid chromatography (HPLC) was introduced for purity determination.

II. Comparative Analysis of Standard Frameworks

Project Dimensions	GB/T 23668—2016	GB/T 23668—2009	Difference Analysis
Quality Fraction/%	First-class products ≥96.00; qualified products ≥95.00	First-class products ≥95.00	Indicators improved, new qualified product grades added
Purity/%	First-class products ≥95.00; qualified products ≥94.00	First-class product ≥94.00	Indicators improved, new qualified product grade
Ash content/%	≤0.20 (first-class product/qualified product)	Not mentioned	New test items

III. Interpretation of core indicators and test methods

1. Determination of mass fraction (titration method)

Use sodium nitrite standard titration solution and starch-potassium iodide test paper to determine the endpoint. This method has high accuracy, with an allowable error of 0.30%.

2. Purity determination (HPLC)

Use reverse phase HPLC, the mobile phase is methanol and water (65:35), and the detection wavelength is 254nm. The purity is calculated by peak area normalization method, and the allowable difference is 0.20%.

IV. Implementation suggestions

Enterprise level:Establish a complete quality control system, and strictly follow the standards for raw material procurement, production process control and finished product inspection.
Testing agency:Equipped with advanced instruments and equipment (such as HPLC) to ensure the accuracy and authority of the testing methods.
Industry collaboration:Regularly organize technical exchanges between enterprises and testing agencies to jointly promote the optimization of standards and the improvement of implementation effects.

More samples: DL/T 368-2010 GB 50021-2001(2009) NB/T 47013.2-2015

Sample only — not a preview of GB/T 23668-2016