Industrial hexamethylenetetramine (four)

4.

4.

In a strong acid solution, a trace amount of sulfate can generate white turbidity with barium salt, which is compared with a standard turbidity solution with a known content

4.

a) 95% ethanol ;

b) Barium nitrate solution: 50g/L;

c) Nitric acid solution, 1+2;

d) Sulfate standard solution: 1mL contains 0.

4.

Weigh 1g sample, accurate to 0.

Preparation of the standard turbidity solution: Take 20.

4.

4.

Trace ammonium salt can produce yellow color with Nessler's reagent, which is compared with the standard colorimetric solution of known content

4.

a) Nessler's reagent;

b) Ammonium salt standard solution: 1mL contains 0.

4.

Weigh 1g sample, accurate to 0.

Preparation of standard colorimetric solution: Take 1.

5 Inspection rules

5.
1 This product should be inspected by the quality inspection department of the manufacturer
.
The manufacturer shall ensure that the quality of all manufactured products meets the requirements of this standard, and each batch of manufactured products shall be accompanied by a quality certificate in a certain format
.
The content includes: manufacturer name, factory address, product name, product grade, number of this standard, production date, batch number, trademark, product net weight
.

5.
2 All items in this standard are type inspection items, of which purity, moisture, and appearance of aqueous solutions are ex-factory inspection items
.
Under normal circumstances, a type inspection is carried out every six months
.

5.
3 The user has the right to check and accept the products received in accordance with the requirements of this standard
.

5.
4 Sampling should be carried out in accordance with the regulations in GB/T6678 and GB/T6679, and the sampled amount shall not be less than 600g
.

5.
5 Mix the collected samples, divide them into two clean and dry wide-mouth bottles with lids, paste the labels, indicate the product name, sampling date and batch number, one bottle for analysis and testing, and the other bottle for 2 months For reference
.

5.
6 The test result is judged according to GB/T1250 rounding value comparison method
.

5.
7 When one of the inspection results does not meet the requirements of this standard, samples should be taken from the packaging unit twice the amount for re-inspection.
Even if only one indicator does not meet the requirements of this standard, the entire batch of products is not Qualified
.

6 Marking, packaging, storage and transportation

6.
1 Industrial hexamethylenetetramine inner film plastic bag, outer woven bag or other suitable material packaging: net weight of each bag is 25kg
.

6.
2 The packaging bag should be marked with: trademark, number of this standard, manufacturer name, product name, batch number, net weight, and fire-proof and moisture-proof signs complying with GB190
.

6.
3 When transporting industrial hexamethylenetetramine, it should be installed in a van or cabin with a tent
.

6.
4 Industrial hexamethylenetetramine should be stored in a dry, clean and ventilated warehouse, and should not be stacked in the open
.

7 Security

7.
1 Industrial hexamethylenetetramine is flammable, avoid contact with open flames
.

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