USD $1.00-1.00 / Kilogram
USD $9.00-99.00 / Kilogram
USD $1.00-1.00 / Kilogram
USD $2.00-10.00 / Kilogram
USD $1.00-1.00 / Kilogram
USD $2.00-10.00 / Kilogram
USD $2.00-10.00 / Kilogram
USD $2.00-10.00 / Kilogram
USD $2.00-10.00 / Kilogram
1.high quality and competetive price
1)we can offer coa certificate and official invoice.
2)we are manufacturer with own lab and factory, can provide high quality products with factory price.
3)products purity is test by our quality department strictly before sending, and you can also ask the third testing organization come and inspect, such as (sgs/ cti/ its), only after your confirmation will we send it out to you.
2.fast and safe delivery
1)products can be arranged first time we receive your prepayment. fixed service person are 7x24h for you to contact.
2) secure and discreet shipment. various transportation methods for your choice, like dhl/ups/tnt/fedex/sf-express/sea/train/air
3.we have clients throughout the world
1) professional service and rich experience make customers feel at ease, adequate stock and fast delivery meet their desire.
2) market feedback and goods feedback will be appreciated, meeting customers' requirement is our responsibility.
3) high quality, competitive price, fast delivery, first-class service gain the trust and praise from the customers.
phthalic anhydride
cas: 85-44-9
abbreviation : pa
mf: c8h4o3
phthalic anhydride specification
item | index of phthalic anhydride | ||
top grade | first grade | qualified product | |
appearance | white scaly or crystalline powder | white scaly or crystalline powder with slight colors | |
molten chroma(chroma no. )≤ | 20 | 50 | 100 |
thermostable chroma(chroma no. )≤ | 50 | 150 | - |
chroma of vitriol(chroma no. )≤ | 60 | 100 | 150 |
crystallization point°c≥ | 130.5 | 130.3 | 130.0 |
purity(mass fraction)%≥ | 99.50 | 99.50 | 99.00 |
free acid(mass fraction)≤ % | 0.20 | 0.30 | 0.50 |
ash(mass fraction)%≤ | 0.05 | - | - |
phthalic anhydride application
1. phthalic anhydride are widely used as a scale&corrosion inhibitor, chelating(sequestrating), deflocculating agent in cooling and boiler water treatment, textile dying, detergents etc.
2. phthalic anhydride is the most important organic chemicals, one of the major derivatives are dibutyl phthalate, 2-ethylhexyl and two isobutyl, such as pvc plasticizers; also used in the production of unsaturated polyester resins, alkyd resins, dyes and pigments, paints a variety of , food additives, pharmaceuticals cathartic relief of phenolphthalein, the imine pesticide parathion, pentachlorophenol and noticeably so.