HG/T 2520-2023 English PDFUS$219.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. HG/T 2520-2023: Phosphorous acid for industrial use Status: Valid HG/T 2520: Historical versions
Basic dataStandard ID: HG/T 2520-2023 (HG/T2520-2023)Description (Translated English): Phosphorous acid for industrial use Sector / Industry: Chemical Industry Standard (Recommended) Classification of Chinese Standard: G11 Classification of International Standard: 71.060.30 Word Count Estimation: 10,139 Date of Issue: 2023-12-20 Date of Implementation: 2024-07-01 Older Standard (superseded by this standard): HG/T 2520-2006 Issuing agency(ies): Ministry of Industry and Information Technology Summary: This standard specifies the requirements, test methods, inspection rules, markings, labels and accompanying documents, packaging, transportation and storage of industrial phosphorous acid. This standard applies to industrial phosphorous acid. Note: This product is mainly used as a raw material for the production of phosphites, synthetic fibers and organophosphorus pesticides, etc., and is also used to produce high-efficiency water treatment agent aminotrimethylenephosphonic acid. HG/T 2520-2006
GB
ICS 71.060.30
G 11
Record Number. 18146-2006 HG
Chemical Industry Standard
of the People's Republic of China
Replacing HG/T 2520-1993
Phosphorous acid for industrial use
工业亚磷酸
ISSUED ON. JULY 26, 2005
IMPLEMENTED ON. MARCH 1, 2005
Issued by.
National Development and Reform Commission, The
People's Republic of China
Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative References ... 4 3 Requirements ... 5 4 Test methods ... 5 5 Inspection rules ... 10 6 Signs and labels ... 11 7 Packaging, transportation and storage ... 11 Foreword This standard is not equivalent to Japanese standard JISK 8063-1994 "Reagent phosphorous acid" (Japanese version). This standard replaces HG/T 2520-1993 "phosphorous acid". The main technical differences between this standard and HG/T 2520-1993 are as follows. - ADD superior product index in requirements (3.2 in this standard). This standard was proposed by China Petroleum and Chemical Industry Association. This standard shall be centralized by the National Standardization Technical Committee - Inorganic Chemistry Chemical Branch (SAC/TC63/SC1). Main drafting organizations of this standard. Hangzhou Daming Chemical Co., Ltd., and Tianjin Chemical Research & Design Institute. The main drafters of this standard. Wuqiu Ming, Weng Zhijian, and Wang Yan. This standard replaces the previous standard. - HG/T 2520-1993. Phosphorous acid for industrial use 1 Scope This standard specifies the industrial phosphorous acid’s requirements, test methods, inspection rules, signs, labels, packaging, transport, and storage. This standard applies to phosphorous acid for industrial use. The product is mainly used as production raw materials of phosphorous acid, synthetic fibres and organophosphorus pesticides etc. It is also used in the production of high-efficient water treatment agent - amino trimethylene phosphonic acid. Molecular formula. H3PO3 Relative molecular mass. 81.99 (according to 2001 international relative atomic mass) 2 Normative References The following documents contain provisions which, through reference in this standard, become provisions of this standard. For dated references, their subsequent amendments (excluding corrections) or revisions do not apply to this standard. However, the parties who enter into agreement based on this standard are encouraged to investigate whether the latest versions of these documents are applicable. For undated reference documents, the latest versions apply to this standard. GB/T 190-1990 Labels for Packages of Dangerous Goods GB/T 191-2000 Packaging - Pictorial Marking for Handling of Goods (eqv ISO 780.1997) GB/T 1250 Rules for expression and judgment of limiting values GB/T 3049-1986 Chemical products for industrial use. General method for determination of iron content. 1,10-Phenanthroline spectrophotometric method (eqv ISO 6685.1982) GB/T 6678 General principles for sampling chemical products GB/T 6682-1992 Water for analytical laboratory use - Specification and test methods (eqv ISO 3696.1987) HG/T 3696.1 Inorganic chemicals for industrial use. Preparations of standard and 4.4.1 Method summary In nitric acid medium, chloride ions in test solution and silver nitrate form insoluble silver chloride. When chloride ion content is low, within a certain time, the silver chloride is shown in suspension, so that the solution is cloudy. The turbidity of the test solution is compared with the standard turbidity solution. 4.4.2 Reagents 4.4.2.1 Nitric acid solution. 1 + 3. 4.4.2.2 Silver nitrate solution. 17 g/L. 4.4.2.3 Chloride standard solution. 1 mL of the solution contains 0.010 mg of chlorine (Cl). PIPETTE 1.00 mL of chloride standard solution that is prepared according to HG/T 3696.2. PLACE in 100 mL volumetric flask. USE water to dilute to the mark. SHAKE evenly. 4.4.3 Analysis steps For superior product, WEIGH (3.00±0.01) g of sample; for first-class product and qualified product, WEIGH (0.50±0.01) g of sample. PLACE in 50mL colorimetric tubes. ADD 20mL of water to dissolve. Then ADD 2 mL of nitric acid solution and 2 mL of silver nitrate solution. USE water to dilute to the mark. SHAKE evenly. PLACE for 10min. The turbidity must not be greater than the standard turbidity solution. The standard is – for superior product, PIPETTE 3.00mL of chloride standard solution; for first-class product, PIPETTE 5.00mL of chloride standard solution; for qualified product, PIPETTE 10.00mL of chloride standard solution. PLACE in 50mL colorimetric tubes. It is treated as same as the test sample at the same time. 4.5 Determination of iron content 4.5.1 Method summary Same as Chapter 2 of GB/T 3049-1986. 4.5.2 Reagents Chapter 3 of GB/T 3049-1986 and; 4.5.2.1 Ammonia. 4.5.2.2 Hydrochloric acid solution. 2 + 3. 4.5.3 Instruments The turbidity of the test solution is compared with the standard turbidity solution. 4.6.2 Reagents 4.6.2.1 Ammonia solution. 2 + 3. 4.6.2.2 Hydrochloric acid solution. 1 + 4. 4.6.2.3 Magnesium mixed solution. WEIGH 5.5 g of magnesium chloride and 7 g of ammonium chloride. PLACE in 200 mL beaker. ADD 65 mL of water to dissolve. Then ADD 35 mL of ammonia solution. PLACE for 24 h. FILTER if necessary. 4.6.2.4 Phosphate standard solution. 1 mL of solution contains 0.1 mg of phosphate (PO4). PIPETTE 10.00 mL of phosphate standard solution that is prepared according to HG/T 3696.2. PLACE in 100 mL volumetric flask. USE water to dilute to the mark. SHAKE evenly. 4.6.3 Analysis steps 4.6.3.1 Preparation of test solution WEIGH (1.00±0.01) g of sample. PLACE in 100 mL volumetric flask. USE water to dilute to the mark. SHAKE evenly. 4.6.3.2 Determination PIPETTE 10mL od solution. PLACE in 25 mL colorimetric tube. ADD 5 mL of aqueous ammonia solution and 5mL of magnesium mixture solution. USE water to dilute to the mark. SHAKE evenly. PLACE for 10min. The turbidity shall not be greater than the standard turbidity solution. The standard is – for superior product, PIPETTE 1.00mL of chloride standard solution; for first-class product, PIPETTE 2.00mL of chloride standard solution; for qualified product, PIPETTE 6.00mL of phosphate standard solution. PLACE in 25mL colorimetric tubes. USE hydrochloric acid solution to adjust pH≈2. It is treated as same as the test sample at the same time. 4.7 Determination of sulphate (counted in SO4) content 4.7.1 Method summary In hydrochloric acid medium, sulphate in test solution and barium chloride form insoluble barium sulphate and is shown in suspension, so that the solution is cloudy. The turbidity of the test solution is compared with the standard turbidity solution. 4.7.2 Reagents use shall comply with the requirements of the standard. 5.5 Use organization has the right to perform the acceptance inspection to the phosphorous acid for industrial use in accordance with the requirements of this standard. The acceptance shall be performed within 1 month from the date of arrival of the goods. 5.6 If the test results in the indicators do not meet the requirements of this standard, it shall be double-sampled from the packaging bags for re-inspection. In re-inspection results, even if only one indicator does not meet the requirements of this standard, the entire batch of product is deemed as unqualified. 5.7 ADOPT the rounding value comparison method specified in GB/T 1250 to determine whether the inspection results meet this standard. 6 Signs and labels 6.1 On drums or bags of phosphorous acid for industrial use, there must have firm and clear signs. The contents include. manufacturer's name and address, product name, trademark, grade, net content, lot number or production date, this standard number, the "corrosive" signs specified in GB 190-1990, and the "Avoid rain" logo specified in GB/T 191-2000. And it shall be accompanied with ""Dangerous Chemical Material Safety Data Sheet" in the package. 6.2 Each batch of phosphorous acid for industrial use shall be accompanied with quality certificates, including. manufacturer's name and address, product name, trademark, grade, net content, lot number or production date, product quality certificate that complies with this standard, and the number of this standard. 7 Packaging, transportation and storage 7.1 for packaging, phosphorous acid for industrial use shall adopt sealed and fully-open barrels or high-intensity composite packaging bags that comply with the relevant transportation safety requirements. The performance and inspection method of each batch of packaging materials shall comply with the relevant provisions. 7.2 Drum-packaging of phosphorous acid for industrial use is in 3 layers. lined 2 layers are polyethylene bags; external packaging adopts sealed and fully-open iron-barrels or fibreboard barrels. The 2 internal bags are tightened with Vinalon rope or ropes with equivalent quality; or it is sealed with other corresponding ways. Iron-barrels or fibreboard barrels are covered with a lid; clamped with clamping ring; and pinned w... ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of HG/T 2520-2023_English be delivered?Answer: Upon your order, we will start to translate HG/T 2520-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of HG/T 2520-2023_English with my colleagues?Answer: Yes. The purchased PDF of HG/T 2520-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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