GB/T 21892-2015 PDF English
US$165.00 · In stock · Download in 9 secondsGB/T 21892-2015: P-aminophenol Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 21892: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 21892-2015 | English | 165 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
P-aminophenol
| Valid |
| GB/T 21892-2008 | English | 359 |
Add to Cart
|
3 days
|
P-Aminophenol
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 21892-2015
GB/T 21892-2015: P-aminophenol---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/GBT21892-2015
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.01;87.060.10
G 56
Replacing GB/T 21892-2008
p-Aminophenol
对氨基苯酚
Issued on: MAY 15, 2015
Implemented on: DECEMBER 01, 2015
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... 5
2 Normative references... 5
3 Requirements... 6
4 Safety information... 7
5 Sampling... 7
6 Test methods... 8
7 Inspection rules... 14
8 Marks, labels, packaging, transportation and storage... 15
p-Aminophenol
WARNING -- Personnel using this Standard should have practical experience in
laboratory work. This Standard does not address all safety issues. Users are
responsible for taking appropriate safety and health measures and ensuring
compliance with the conditions stipulated in relevant national laws and regulations.
1 Scope
This Standard specifies the requirements, sampling, test methods, inspection rules, as
well as marks, labels, packaging, transportation and storage of p-aminophenol.
This Standard applies to the quality control of p-aminophenol products.
Structural formula.
Molecular formula. C₆H₇NO
Relative molecular mass. 109.13 (according to the 2009 International Atomic Mass
Standard)
CAS RN. 123-30-8
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 190, Labels for packages of dangerous goods
GB/T 191, Packaging and storage marks
GB/T 601, Chemical reagent -- Preparations of reference titration solutions
GB/T 603, Chemical reagent -- Preparations of reagent solutions for use in test
methods
GB/T 2384, Dyes intermediates -- General method for the determination of melting
range
GB/T 2386-2014, Dyestuffs and intermediate of dyes -- Determination of moisture
content
GB/T 6678-2003, General principles for sampling chemical products
GB/T 6682-2008, Water for analytical laboratory use -- Specification and test
methods
GB/T 8170-2008, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB 12268-2012, List of dangerous goods
GB 12463, General specifications for transport packages of dangerous goods
GB 15258, General rules for preparation of precautionary label for chemicals
GB 15603, General rules for the hazardous chemicals warehouse storage
GB/T 16483, Safety Data Sheet for Chemical Products -- Content and Order of
Sections
GB 20814, Limit and determination of the quantity of heavy-metal elements in dye
products
GB/T 21876, Solvent dyes and intermediate of dyes -- Determination of ash content
3 Requirements
The quality requirements for p-aminophenol shall comply with the requirements in
Table 1.
4 Safety information
4.1 Safety
According to GB 12268-2012, p-aminophenol is designated as a dangerous good (UN.
2512). It is classified as Class 6.1, a toxic substance. It is flammable when exposed to
open flames or high temperatures. It reacts with strong oxidants. It decomposes upon
heating, releasing toxic and corrosive gases. Contact with hot surfaces can cause
allergic reactions. Ingestion or inhalation of dust can cause death or health damage.
Strict safety precautions must be observed during use and handling.
4.2 Safety data sheet
According to GB/T 16483, p-aminophenol should be provided with a detailed safety
data sheet before leaving the factory. The safety data sheet should include the following.
a) Provide information on the hazards of the product;
b) Instructions for safe use;
c) Transportation and storage requirements;
d) Protective measures;
e) Emergency response measures and other safety information.
5 Sampling
Sampling is conducted in batches. Manufacturers consider uniform products to be a
batch. The number of samples collected per batch should comply with the requirements
of Section 7.6 of GB/T 6678-2003.The packaging of the sampled products must be
intact. Avoid the ingress of foreign matter into the product during sampling. Use a probe
to collect samples from the upper, middle, and lower sections. The total sample volume
should be no less than 500 g. After thoroughly mixing the samples, divide them into
two clean, dry, well-sealed containers and label them. Indicate the product name, batch
number, manufacturer name, sampling date, and location. Keep one container for
inspection and one for future reference.
6 Test methods
6.1 General
Unless otherwise specified, only reagents that are confirmed as analytically pure and
Grade 3 water as specified in GB/T 6682-2008 are used. Standard titrant solutions,
preparations, and products used in the tests, unless otherwise specified, are prepared
and calibrated in accordance with GB/T 601 and GB/T 603.Test results are determined
using the rounded value comparison method described in 4.3.3 of GB/T 8170-2008.
6.2 Appearance assessment
Visual assessment is performed under natural northern daylight.
6.3 Determination of p-aminophenol mass fraction (amino value)
6.3.1 Determination principle
Use diazotization method.
The mass fraction of p-aminophenol is determined based on the principle that aromatic
primary amines react with sodium nitrite to form diazonium salts in a low temperature
and excess inorganic acid environment.
6.3.2 Reagents and solutions
6.3.2.1 Hydrochloric acid.
6.3.2.2 Potassium bromide solution. 100 g/L.
6.3.2.3 Sodium nitrite standard titration solution. c(NaNO2) = 0.1 mol/L; use starch-
potassium iodide test paper to determine the endpoint during calibration.
6.3.2.4 Starch-potassium iodide test paper.
6.3.3 Determination steps
Weigh approximately 0.25 g~0.30 g of the specimen (accurate to 0.0001 g) into a 250
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 21892-2015 be delivered?Answer: The full copy PDF of English version of GB/T 21892-2015 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 21892-2015_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 21892-2015_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 21892-2015 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. Question 5: Should I purchase the latest version GB/T 21892-2015?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21892-2015 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. How to buy and download a true PDF of English version of GB/T 21892-2015?A step-by-step guide to download PDF of GB/T 21892-2015_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 21892-2015".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|