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GB/T 16451-2017: Natural fatty alcohols Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 16451: Historical versions
Similar standardsGB/T 16451-2017: Natural fatty alcohols---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT16451-2017GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.080.60 G 17 Replacing GB/T 16451-2008 Natural fatty alcohols Issued on. DECEMBER 29, 2017 Implemented on. JULY 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Product classification... 4 4 Requirements... 5 5 Test methods... 7 6 Inspection rules... 21 7 Marks, packaging, transportation, storage... 231 ScopeThis Standard specifies the product classification, requirements, test methods, inspection rules and marks, packaging, transportation and storage for natural fatty alcohols. This Standard is applicable to a series of fatty primary alcohol products obtained from natural vegetable oils and their derivatives through alcoholysis or hydrolysis, esterification, hydrogenation and distillation.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 617, Chemical reagent -- General method for the determination of melting range GB/T 6682, Water for analytical laboratory use -- Specification and test methods GB/T 7383-2007, Non-ionic surface active agents -- Determination of hydroxyl value GB/T 9282.1, Clear liquids -- Estimation of colour by the platinum-cobalt scale -- Part 1.Visual method3 Product classificationNatural fatty alcohols are divided into ten categories according to the carbon chain length. C8~10 alcohols, C12~14 alcohols, C14~16 alcohols, C16~18 alcohols, C8 alcohols, C10 alcohols, C12 alcohols, C14 alcohols, C16 alcohols, and C18 alcohols.4 RequirementsNatural fatty alcohols have an inherent characteristic odor. The physical and chemical indicators shall meet the requirements in Table 2.When used as cosmetic raw material, they shall also meet the requirements in Table 3.5 Test methodsUnless otherwise stated, only reagents confirmed to be analytically pure and grade three water in accordance with GB/T6682 are used in the analysis. 5.1 Sample preparation After mixing the samples (solid samples shall be melted and mixed) before sampling test. 5.2 Appearance Put samples in beakers or glass jars. Visually inspect the color and state of the sample at 30°C. 5.4 Color 5.4.1 Specimen processing The solid fatty alcohol specimen needs to be heated to 75°C±5°C. After it is completely melted, immediately pour it into a pre-warmed colorimetric tube. 5.4.2 Determination According to the provisions of GB/T 9282.1.The resulting platinum-cobalt color units are expressed in Hazen. 5.5 Acid value NOTE. The number of milligrams of potassium hydroxide required to neutralize the acidity of 1 g of fatty alcohol specimen is called the acid value. 5.6 Saponification value NOTE. The number of milligrams of potassium hydroxide required to saponify 1 g of fatty alcohol specimen is called the saponification value of fatty alcohol. 5.6.1 Reagents Reagents include. 5.6.3 Test procedures Weigh 10 g of specimen (accurate to 0.001 g) and place it in the conical flask [5.6.2a)]. Use a pipette to transfer 25 mL of 0.1 mol/L potassium hydroxide-ethanol solution. Install the reflux condenser. 5.6.4 Calculation of results The saponification value X2 of fatty alcohol is calculated in KOH, expressed in milligrams per gram (mg/g), and calculated according to formula (2). 5.7 Iodine value NOTE. The number of grams of iodine absorbed per 100 g of fatty alcohol specimen is called iodine value. 5.7.1 Reagents Reagents include. 5.7.2 Instruments Commonly used laboratory instruments and the following. 5.7.3 Test procedures Accurately weigh 5 g of specimen (accurate to 0.001 g) in iodine bottle. Use a graduated cylinder to add 20 mL of carbon tetrac 5.7.4 Calculation of results Fatty alcohol iodine value X3, calculated as I2, expressed in grams per hectogram (g/100 g), is calculated according to formula (3). 5.7.5 Precision The absolute difference between two independent determination results obtained under repeatability conditions is not more than 0.2 g/100 g. The premise is that the case of greater than 0.2 g/100 g does not exceed 5%. 5.8 Hydroxyl value (chemical method) - arbitration method According to the provisions for the acetic anhydride method in GB/T 7383-2007. 5.9 Main component content, hydroxyl value and alkane content (chromatographic method)6 Inspection rules6.1 Inspection classification 6.1.1 Type inspection Type inspection items include all items in Chapter 4.Type inspection shall be carried out in the following situations. 6.1.2 Exit-factory inspection The requirements in Table 2 in Chapter 4 are all exit-factory inspection items. 6.2 Batching and sampling rules 6.3 Judgment rules and re-inspection For the test results of physical and chemical indicators, use the rounding value comparison method to determine whether the products are accepted or rejected. If one item fails, twice as many samples can be taken again to reinspect the failed item. 6.4 Arbitration If both parties to the delivery still have disputes over the re-inspection results, they can request arbitration for inspection according to this Standard. The arbitration result shall be the final basis.7 Marks, packaging, transportation, storage7.1 Marks Each package of natural fatty alcohol and the accompanying quality certificate shall have the following marks. 7.2 Packaging Bulk fatty alcohol products are generally transported by tank truck or ISOTANK. Generally, fatty alcohol products are packaged in steel drums, composite plastic woven bags or cartons. The barrel mouth of the barreled product shall be sealed. The bagged or boxed product shall be well sealed. 7.3 Transportation Fatty alcohols shall be transported with coverings to avoid direct sunlight, rain and moisture. They shall be lightly loaded and unloaded. Avoid damage to the packaging. 7.4 Storage Fatty alcohol shall be stored in a well-ventilated warehouse. Pay attention to sun protection and moisture protection. The stack height shall not exceed the maximum load of the support. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 16451-2017 be delivered?Answer: The full copy PDF of English version of GB/T 16451-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 16451-2017_English with my colleagues?Answer: Yes. 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