GB/T 16451-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 16451-2017 | English | 255 |
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Natural fatty alcohols
| Valid |
| GB/T 16451-2008 | English | 599 |
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Natural fatty alcohols
| Obsolete |
| GB/T 16451-1996 | English | 559 |
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Natural fatty alcohols
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 16451-2017
GB/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/GBT16451-2017
GB
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 Contents
Foreword... 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... 23
1 Scope
This 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 references
The 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 method
3 Product classification
Natural 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 Requirements
Natural 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 methods
Unless 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 rules
6.1 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, storage
7.1 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.
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