The Enterprise Standards of Glycolic acid 70% is drafted in accordance with the provisions of GB/T 1.1-2020 “Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents”.
Drafted by : Jinan Huashihang Chemical Co., Ltd
Main drafter of this document: Du Chuncai
This document is mainly revised by Du Chuncai
First released : August 6, 2016
Revision date : August 6, 2023
1 Glycolic acid Scope
This document specifies the technical requirements, test methods, inspection rules, packaging, transportation, and storage of industrial hydroxyacetic acid. This document is applicable to industrial hydroxyacetic acid prepared from hydroxyacetonitrile, mainly used as a dyeing aid for wool and nylon, as well as for electricity, adhesives, and metal washing.
2 Glycolic acid Normative References
The content in the following documents constitutes an essential clause of this document through normative references in the text. Among them, for dated reference documents, only the version corresponding to that date applies to this document: for undated reference documents, the latest version (including all modification orders) applies to this document.
GB/T 601 Chemical Reagents – Preparation of Standard Titration Solutions
GB/T 602 Chemical Reagents – Preparation of Standard Solution for Impurity Determination
GB/T 603 Preparation of formulations and products used in chemical reagent test methods
GB/7 3723 General rules for sampling safety of industrial chemical products
GB/T 6678 General Rules for Sampling of Chemical Products
GB/T 6680 General Rules for Sampling of Liquid Chemical Products
GB/T 6682 Specification and Test Methods for Water Used in Analytical Laboratories
GB/T 9739 Chemical Reagents – General Method for the Determination of Iron
3 Terms and definitions
This document does not have any terminology or definitive text that needs to be defined.
4 Glycolic acid Requirements
4.1 Appearance
This product is a colorless or slightly yellow transparent liquid without suspended solids and mechanical impurities.
4.2 Technical indicators
The technical indicators of industrial acetic acid should meet the requirements of Table 1.
| Item | Specifications | |
| Liquid | Solid | |
| Assay | ≥70.00% | ≥99.00% |
| Free acid | ≥62.00% | ———– |
| Chloride (Cl) | ≤0.001% | ≤0.001% |
| Sulphate (SO42-) | ≤0.015% | ≤0.010% |
| Water insoluble substance | ≤0.010% | ≤0.010% |
| residue on ignition | ≤0.300% | ≤0.10% |
| Fe | ≤0.001% | ≤0.001% |
| Color (Hazen) | ≤20.00 | ————- |
5.3 Appearance
Analysis method: Place the liquid product in a 50 color comparison tube, and use visual method to determine the positive contrast tube under natural light.
5.4 Glycolic acid content
5.5 free acid content
5.6 chloride content (calculated as Cl)
5.7 sulfate (calculated as SO42-) content
5.8 ignition residue
5.9 water insoluble substances
5.10 iron FE content
For further test method process , please contact us sales@sdhshchem.com or info@huashihang-chemical.com
