Industrial cyclopentane (4)

4.

Carry out according to the method stipulated in "7 Direct Coulometric Titration Method" in GB/T6283-1986

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

4.

Carry out according to the method specified in SH/T0253.

4.

The organic sulfur standard solution contains about 0.

In the formula: m—the mass of n-dibutyl sulfide, g;

100—The volume of the solution, mL;

0.

4.

For the test conditions of the instruments and equipment, see Table 4 of the recommended operating parameters

Table 4 Recommended operating parameters

4.

The sulfur content c expressed in micrograms per milliliter (ug/mL) is calculated according to formula (6):

In the formula: F-sulfur recovery rate, %;

m _s —the mass of sulfur titrated by the microcoulometer, ug;

V—The volume of the sample, uL

5 Inspection rules

5.

5.

Each batch of products should be accompanied by a quality certificate in a certain format, including: product name, manufacturer name, factory address, batch number or production date and the number of this standard
.

5.
3 Industrial cyclopentane is a batch of homogeneous products of the same quality
.
The batch of barreled products is no more than 20t, and the batch of canned products is based on the volume of each canned product
.

5.
4 The sampling of industrial cyclopentane shall be carried out in accordance with the provisions of GB/T6678 and GB/T6680
.
The total sampling volume is not less than 100 mL, and the mixture is evenly mixed and then packed into two clean, dry 100 mL glass bottles with a ground mouth
.
Affix a label and indicate: product name, batch number, sampling date and name of the sampler
.
One bottle is for inspection, the other is sealed and kept for future reference
.

5.
5 The test result is judged according to the rounding value comparison method in GB/T1250
.
If one of the inspection results does not meet the requirements of this standard, the barreled product shall be re-sampled from twice the number of packaging units for inspection, and the canned product shall be re-sampled at multiple points for inspection
.
Even if only one index does not meet the requirements of this standard as a result of the re-inspection, the whole batch of products is unqualified
.

6 signs, packaging, transportation, storage

6.
1 Industrial cyclopentane packaging containers should have firm and clear signs, including: product name, trademark, manufacturer name, factory address, net quality, batch number, number of this standard, the "flammable liquid" sign specified in GB190 and The "scared" sign stipulated by GB191; the packaging container should also have a safety label that meets the requirements of GB15258
.

6.
2 Industrial cyclopentane should be packed into clean and dry 200L small-door galvanized steel drums.
The galvanized steel drums should meet the requirements of GB12463-1990 Class I packaging, or be packed in mobile pressure vessels
.

6.
3 When industrial cyclopentane is transported by mobile pressure vessels, the vessels used should comply with the requirements of the State Bureau of Quality and Technical Supervision, Boiler and Pressure Vessel Safety Supervision Bureau, Quality and Technical Supervision Bureau Guofa [1999] No.
154, "Pressure Vessel Safety Technical Supervision Regulations" The second category of pressure vessels or pressure vessels higher than this level shall be transported in accordance with the regulations for the transportation of dangerous goods
.

6.
4 Industrial cyclopentane should be stored in a cool, ventilated warehouse.
Sometimes it should be stored in the sun, avoid fire sources and oxidants; the packaging should be prevented from being damaged
.

7 security

Industrial cyclopentane is a highly flammable organic liquid with an explosive limit of 1.
5% to 8.
7% (volume fraction) in the air
.
Since cyclopentane vapor is heavier than air, it can flow along the ground and may cause a fire at a distance
.
Foam or dry powder fire extinguishers can be used to extinguish the fire
.
Avoid the accumulation of electrostatic charges on the equipment
.

Industrial cyclopentane irritates the eyes and skin and has effects on the central nervous system.
Contact may cause dermatitis.
Inhalation may cause dizziness, excitement and anesthesia.
Care should be taken to avoid inhalation of vapor and skin contact
.