DPPD Antioxidant H cas74-31-7(N,N-diphenyl-p-phenylenediamine)
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ANTIOXIDANT H
Executive standard: Q/YTH 001-2006
English name: Antioxidant H
Chinese another name: N,N'-二苯基对苯二胺
English another name: N,N-diphenyl-p-phenylenediamine
English abbreviation: DPPD
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
1.5 Specific gravity: 1.2
1.6 Solubility: Dissolve in benzene, toluene, ether, acetone. Dissolve slightly in ethanol. Undissolved in water.
1.7 Boiling point : 220-225℃ 0.5mmHg
1.8 Stability 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:
Item | Index | ||
Refined | 1stgrade | 2ndgrade | |
Initial melting point,℃ | ≥140.0 | ≥135.0 | ≥125.0 |
Ash content ,(m/m) | ≤0.40 | ≤0.40 | ≤0.40 |
Decrement by heating ,(m/m) | ≤0.40 | ≤0.40 | ≤0.40 |
Remainder through sieving (100目),% (m/m) | ≤1.0 | ≤1.0 | ≤1.0 |
Appearance | Greyish brown powder |
3. Uses:It can be used as antideteriorant in solid propellant to improvethestorage stability of product, and it can be 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.