HG/T 3989-2014Resorcinol (1,3-benzenediol) (English PDF)

4.1 Safety

According to GB 12268-2012, the m-Dihydroxybenzene is the 6.1 item toxic substance, which has a hazardous product number of UN:2876. The exposure of skin to m-Dihydroxybenzene which causes skin to absorb it or eat by mistake, the inhalation of its vapor or dust will cause poisoning. Once incident occurs, it shall seek doctor in time. During use and handling, it shall wear personal protection equipment and pay special attention to safety.

4.2 Safety data sheet

According to GB/T 16483, this product shall provide a detailed safety data sheet during exit-factory. The safety data sheet shall contain the following information:

a) The hazardous information of this product;

b) The method of safe use;

c) The requirements for transportation and storage;

d) Protective measures;

e) Emergency response measures, etc.

6.1 General requirements

After shaking the mobile phase uniformly, use ultrasonic generator for de-gassing.

6.5.5 Preparation of solution

Weigh 0.04 g (accurate to 0.001 g) of m-Dihydroxybenzene. Put it into a 10 mL brown volumetric flask. Add methanol solution to dissolve it and dilute it to the mark. Mix it uniformly. Let it be oscillated and fully dissolved in the ultrasonic generator to prepare for use.

6.5.6 Determination procedures

Turn on the instrument to warm it up. After the instrument runs stably, use the microinjector or the auto-sample injector to inject 5 µL of the specimen solution.

After the component is empty (see the chromatogram as shown in Figure 1). Use the chromatography workstation or integrator to process the results.

Under the preconditions of guaranteeing the degree of separation, sensitivity, linear response, it may adjust appropriately the sample injection amount.

6.5.7 Calculation of results

The purity of m-Dihydroxybenzene as well as the content of quinol, catechol, phenol is calculated in wi, expressed in %, which is calculated according to the formula (2):

Where: Ai - The peak area of each component i;

sum Ai - The sum of the peak areas of each component i; The calculation result retains 2 decimal places.

6.5.8 Allowable difference

The difference of the parallel determination results of m-Dihydroxybenzene shall be not more than 0.20%. The relative error of the parallel determination results of the content of quinol, catechol, phenol, other organic impurities shall be not more than 10%. Take the arithmetic mean as the determination result.

6.5.9 Chromatogram

The chromatogram is as shown in Figure 1. comply with the requirements of this standard, the entire batch of products is disqualified.

8.1 Marking

Each package of m-Dihydroxybenzene shall be printed with a durable and clear marking according to the relevant provisions of GB 190 and GB/T 191-2008. The marking shall include at least:

a) Product's name;

b) Manufacturer's name and address;

c) Date of manufacture;

d) Number of marking of production certificate;

e) Net content;

f) Warning sign (toxic substance).

8.2 Tag

The product shall have tags. The compilation of tags shall comply with the provisions of GB 15258. On the tag it shall be indicated of the date of manufacture of product, qualification certificate, number of implemented standard, batch number.

8.3 Packaging

The m-Dihydroxybenzene is packed by the woven bag which is internally lined with black plastic bag or the paper-plastic composite bag. The net content of each bag is 25 kg ± 0.25 kg. The net content of other packaging may be determined through negotiation with the user. The product's packaging shall comply with GB 12463 and the relevant provisions on the packaging of hazardous chemical products.

8.4 Transportation

The m-Dihydroxybenzene product shall be transported strictly according to the requirements for hazardous cargo and toxic cargo in China. It shall be handled gently, avoid sun-exposure, collision, rain.

8.5 Storage

The m-Dihydroxybenzene is a toxic substance, which will burn in case of […]