GB 26721-2011Arsenic trioxide (English PDF)

5.1 Chemical composition

The chemical composition of arsenic trioxide should conform to the provisions of Table 1.

Table 1 Chemical Composition

Grades As2O3-1 As2O3-2 As2O3-3 As2O3/% Not less than 99.5%, 98.0%, 95.0% Impurity content a/% not greater than Cu Zn Fe Pb Bi Sb 0.0050 - -0.0010 - -0.0020 - -0.0010 - -0.0100 - -0.2000 - -Requirements for impurity elements not listed in table a shall be agreed upon by the supplier and the buyer.

5.2 Physical Properties

The whiteness of arsenic trioxide should meet the requirements of Table 2.

Table 2 Whiteness

Grades As2O3-1 As2O3-2 As2O3-3 Whiteness/% not less than 60 40 -

5.3 Appearance Quality

Arsenic trioxide is a white or grayish-white powder or granules that does not caking.

7.1 Inspection and Acceptance

7.1.1 Arsenic trioxide shall be inspected by the supplier or a third party, and the product quality shall comply with the provisions of this document and the order form.

7.1.2 The buyer shall inspect the received products. If the inspection results do not conform to the provisions of this document or the purchase order, the buyer shall, upon receipt of the products, request an inspection.

The buyer shall notify the supplier within 90 days from the date of purchase, and the matter shall be resolved through negotiation between the supplier and the buyer. If arbitration is required, the arbitration sampling shall be conducted jointly by the supplier and the buyer at the buyer's location.

7.2 Batching

Products should be submitted for inspection in batches, each batch should consist of the same grade of arsenic trioxide, and each batch should weigh no more than 22.5 tons (or according to supply and demand).

(as required by the party).

7.3 Inspection Items

Each batch of arsenic trioxide should be tested for chemical composition, whiteness, and appearance quality.

7.4 Sampling and Sample Preparation

7.4.1 Sampling shall be carried out in accordance with the provisions of GB/T 1605.

7.4.2 When preparing the sample, reduce the sample to 80g using the quartering method, put it into a light-proof, dry, and airtight container, and store it for later use.

7.4.3 The appearance quality of the products shall be inspected for each barrel.

7.5 Judgment of Test Results

7.5.1 The numerical rounding of the test results shall be performed in accordance with the provisions of GB/T 8170, and the rounding value comparison method shall be used for judgment.

7.5.2 If the test results of the chemical composition do not conform to the specifications in this document or the order form, the batch of products shall be deemed unqualified.

7.5.3 If the whiteness test results do not conform to the provisions of this document, the batch of products shall be deemed unqualified.

7.5.4 If the results of the appearance quality test do not conform to the specifications in this document or the order form, the product shall be deemed unqualified.

8.1 Marking

8.1.1 The marking of this product shall be in accordance with the provisions of GB 190 and GB 30000.1, and the packaging drum shall have a " " mark.

8.1.2 Each drum package shall be labeled with. supplier's name and address; product name and brand; batch number and weight; production date.

8.2 Packaging, transportation, and storage

8.2.1 Arsenic trioxide is packaged in sealed iron drums with a non-detachable lining, anti-corrosion coating, or plastic packaging. Each drum may have a net weight of 25 kg ± 0.125kg, 50kg±0.25kg, 100kg±0.5kg,.200kg±1kg, 250kg±1.25kg. Special requirements apply to packaging specifications.

The specific timeframe shall be determined through negotiation between the supply and demand parties.

8.2.2 Arsenic trioxide should be kept clean, moisture-proof, corrosion-proof, and break-proof during transportation and storage. It should not come into contact with other contaminants and should be protected from external contamination.

Leakage, pollution.

8.3 Accompanying Documents

Each batch of arsenic trioxide should be accompanied by documentation, which should include supplier information, product information, document number, and date of manufacture or packaging.

In addition, the period should include.

a) Product quality guarantee certificate, the contents of which are as follows.

- Main performance and technical parameters of the product - Product features (including manufacturing process and raw material characteristics) - Responsibility for product quality - Product quality certifications and analytical test results bearing the supplier's quality inspection stamp;

b) Product certificate, containing the following.

- Test items and their results or test conclusions, - Batch or lot number - Inspection date, - Inspector's signature or stamp;

c) Inspection reports during the product quality control process and finished product inspection reports;