Executive standard: Q/YTH 001-2006

English name: Antioxidant H

English another name: N,N-diphenyl-p-phenylenediamine

CAS RN: 74-31-7

1. Physical and chemical properties:

1.1 Appearance: Greyish brown powder

1.2 Molecule formula: C18H16N2

1.3 Molecule weight: 260.34

1.4 Solubility: Dissolve in benzene, toluene, ether, acetone. Dissolve slightly in ethanol. Undissolved in water.

1.5 Specific gravity: 1.2

1.6 Boiling point : 220-225°C 0.5mmHg

1.7Stability and reactivity : It’s flammable. When it’s exposed to air or sunlight the product will be oxidized and changed its color. When contacting with hot dilute hydrochloric acid it becomes green.

2. Technique indexes:

3. Uses: It’s used for those rubbers and latices of natural, styrene-butadiene, acrylonitrile-butadiene,cis-1,4-polybutadiene,butyl,butylhedroxyl,cis-1,4-polyisopreneetc,so that to possess them those properties such as good resistance to many times of flexure and chap-resisting , highten the elongating strength , strengthen the defending function to hot-oxygen , ozone and some harmful metals such as copper , manganese and so on , and do not influence vulcanization of those rubbers. It can be resolved manifold problems existing in the deep-color rubber products while antioxidant H is used together with antioxidant D. Moreover it can be also used as the hot-oxygen stabilizer for those engineering plastics such as polyethylene, polypropylene, polyamide, polyformaldehyde and etc to improve their climate-resisting performance. The referential dosage is 0.2-0.3%.

4. Safety notes: The product is considered toxic. When handling it should be worn dust gauze mask, rubber gloves and rubberized fabric protection clothing.

5. Package: Laminated film knitting bag, in which is put plastic bag, net weight 20 kg a bag.

6. Storage: Keep in a shady and ventilating place. Its shelf life is 12 months. The product can be still used if up to standard through retest after the specified date.

7. Transportation: Prevent high temperature, sun-scorched and rain drenched during transportation.

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