Ethyl acetate for industrial use (2)

4.

Carry out according to the method specified in GB/T12717-2007

Take the arithmetic mean of the two parallel determination results as the determination result, and the absolute difference between the two parallel determination results shall not exceed 0.

4.

Carry out according to the method specified in GB/T12717-2007

Take the arithmetic mean of the two parallel determination results as the determination result: the absolute difference between the two parallel determination results is not more than 25% of the arithmetic mean of the two determination values

The industrial ethyl acetate prepared by the acetaldehyde condensation process is suitable for the determination of moisture by gas chromatography

4.

Carry out according to the method specified in GB/T12717-2007

Take the arithmetic average of the two parallel determination results as the determination result, and the absolute difference between the two parallel determination results shall not exceed 0.

4.

Carry out according to the method specified in GB/T12717-2007

4.

Carry out according to the method specified in GB/T12717-2007

Take the arithmetic average of the two parallel determination results as the determination result, and the absolute difference between the two parallel determination results shall not exceed 0.

4.

Carry out according to the method specified in GB/T12717-2007
.

Take the arithmetic mean of the two parallel determination results as the determination result, and the absolute difference between the two parallel determination results shall not exceed 0.
0005%
.

4.
9 Determination of odor

Carry out according to the method specified in GB/T12717-2007.

5 Inspection rules

5.
1 Inspection is divided into factory inspection and type inspection
.

5.
1.
1 The factory inspection items are the appearance and the ethyl acetate content, ethanol content, moisture, acidity and color in Table 1 , which should be inspected batch by batch
.

5.
1.
2 The type inspection item date is the appearance and other items except smell in Table 1.
Under normal production conditions, type inspection should be carried out at least once a month
.
Type inspection should also be carried out in one of the following situations:

a) Update key production processes;

b) The main raw materials have changed;

c) Resuming production after stopping production;

d) There is a big difference between the factory inspection result and the last type inspection result;

e) Contract stipulations
.

5.
2 Industrial ethyl acetate is inspected by the quality inspection department of the manufacturer
.
The manufacturer shall ensure that each batch of manufactured products meets the requirements of this standard and is accompanied by a quality certificate in a certain format.
The content includes: the name and address of the manufacturer, the product name, the date of production or batch number, the quality level, the net content and this standard number and so on
.

5.
3 Under the condition of unchanged raw materials and technology, the actual batch of continuous production of the product is a group of batches, but the time for several production batches to form an inspection batch usually does not exceed 1d
.

5.
4 Sampling shall be carried out in accordance with the provisions of GB/T3723, GB/T6678-2003 and GB/T6680-2003, and the total amount of samples shall not be less than 1L
.
After mixing the sample thoroughly, divide it into two clean, dry, ground glass bottles, label them, indicate the name of the manufacturer, product name, batch number, specifications, sampling date and sampler, one bottle is for For analysis and inspection, another bottle is kept for future reference
.

5.
5 The judgment of the test result should be carried out according to the rounding value comparison method specified in GB/T1250
.
If one of the indicators in the inspection result does not meet the requirements of this standard, the barreled product shall be sampled in twice the amount of the packaging unit for inspection, and the canned product shall be sampled at multiple points for inspection
.
Even if the result of the re-inspection does not meet the requirements of this standard, the entire batch of products should be degraded or unqualified
.

5.
6 The judgment of the test results of the odor item shall be negotiated by the supplier and the buyer
.

6 Marking, packaging, transportation and storage

6.
1 Logo

The packaging container of industrial ethyl acetate products should be coated with a firm logo, which includes: the name of the manufacturer, the product name and the number of this standard, and the packaging container should also have a "flammable liquid" logo that meets the requirements of GB190-1990
.

6.
2 Packaging

Industrial ethyl acetate should be packaged in clean, stainless steel or iron tank trucks or clean, dry and firm steel drums, and the drum mouth should be sealed
.

Industrial ethyl acetate can also be packaged and filled in other containers approved by the relevant state departments to ensure safety, and implement the relevant safety supervision and management regulations of the container
.

6.
3 Transportation

The transportation, loading and unloading work must be carried out in accordance with the dangerous goods transportation regulations
.

6.
4 Storage

Ethyl acetate for industrial use should be stored in a cool, ventilated, and dry place, and attention should be paid to moisture-proof during storage
.

7 Security

7.
1 Danger warning

Industrial ethyl acetate is a colorless and flammable liquid, with a flash point of -4°C (closed cup), an auto-ignition temperature of 427°C, a melting point of -84°C, a boiling point of 77°C, and the explosive limit in the air from 2.
2% to 11.
5% (volume fraction)
.
Its vapour is heavier than air and may move along the ground and cause distant fires
.
It is easy to cause violent combustion or explosion when exposed to heat or open flame
.
Ethyl acetate is irritating to the eyes, skin and respiratory tract, and may have an effect on the nervous system
.

7.
2 Safety measures

When industrial ethyl acetate leaks, you should evacuate the dangerous area, collect the leaked liquid in a sealable container as much as possible, absorb the remaining liquid with sand or inert absorbent, and move it to a safe place, do not flush into the sewer; in case of fire, use Extinguishing with sand, foam, carbon dioxide , dry powder, water is ineffective.
Avoid contact of ethyl acetate with skin.
If it splashes into the skin and eyes, rinse with plenty of water or normal saline immediately, and then seek medical attention quickly
.