| CAS No.: | 30525-89-4 |
|---|---|
| Formula: | Oh(CH2o)Nh (N = 8 - 100) |
| EINECS: | 608-494-5 |
| Appearance: | White Powder or Granules |
| Un: | 2213 |
| Hazard Class: | 4 |
| Samples: |
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| Customization: |
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Audited Supplier Brief Introduction:
Paraformaldehyde (PFA) is the smallest polyoxymethylene, the polymerization product of formaldehyde with a typical degree of polymerization of 8-100 units. Paraformaldehyde commonly has a slight odor of formaldehyde due to decomposition. Paraformaldehyde is a poly-acetal.
Use:
Once paraformaldehyde is depolymerized, the resulting formaldehyde may be used as a fumigant, disinfectant, fungicide, and fixative. Longer chain-length (high molecular weight) polyoxymethylenes are used as a thermoplastic and are known as polyoxymethylene plastic (POM, Delrin). It was used in the past in the discredited Sargenti method of root canal treatment.
Paraformaldehyde is not a fixative; it must be depolymerized to formaldehyde in solution. In cell culture, a typical formaldehyde fixing procedure would involve using a 4% formaldehyde solution in phosphate buffered saline (PBS) on ice for 10 minutes. In histology and pathology specimens preparation, usually, the fixation step is performed using 10% Neutral Buffered Formalin (4% formaldehyde) for, at least, 24 hours.
Paraformaldehyde is also used to crosslink proteins to DNA, as used in ChIP (chromatin immunoprecipitation) which is a technique to determine which part of DNA certain proteins are binding to.
Paraformaldehyde can be used as a substitute of aqueous formaldehyde to produce the resinous binding material, which is commonly used together with melamine, phenol or other reactive agents in the manufacturing of particle board, medium density fiberboard and plywood.
Storage: Store in a cool ventilated warehouse; keep away from fire and heat.
| Item | Unit | Specification |
| Formaldehyde content | Wt % | 96±1 |
| Acidity (calculated as formic acid) | Wt% | 0.03max |
| Ash content | Wt% | 0.03max |
| Depolymerization time | min | 25max |
| PH (10g/L aqueous solution) | 4-7 | |
| Appearance | White powder or granules |
Packaging:
25KG/BAG, 10-15ton/20'FCL with pallets.
500KG/BAG, 20ton/40'FCL with pallets.
Shipping:
Fast shipping, 7--14 days after receiving TT deposit or Original LC.
Shandong Longze Chemical Co.,Ltd mainly produces and supplies Dimethyl carbonate, Propylene glycol, Propylene carbonate, Diethyl carbonate, Isopropyl alcohol, Diisopropyl ether, succinct acid and Maleic acid, etc.
Focusing on supplying high quality products and better services to our customers and establishing a win-win cooperation relationship with our partners, LONGZE always try to create more values for customers.By the strongest supports and trust from our upstream and downstream customers, Shandong Longze has experienced diversified and rapid development. At present,our business have been involved in some industries like coatings&Paints, cosmetics&foods&flavors&pharmas, Resins&plasticizer&PU and drilling &oil recovery chemicals, etc.
With strict quality control and continuous innovation, we already get the certificate of ISO 9001, Kosher and Halal certificate. Looking to the future, Longze will strive to establish a long-term and stable cooperation with professional companies all around the world.
Stable supplying and timely delivery to customers
Integrity and perfect tracking management
High quality products and better services
Professional experience and skills on operating dangerous products and non-dangerous products
We specialize in this field for 19 years, with the strength of Dimethyl carbonate, propylene glycol (tech, food, USP grade), propylene carbonate, Isopropyl alcohol, Diisopropyl ether, succinic acid, Maleic acid and the other products.
Our HK company, Wanchem international limited, is specializing in petroleum additives, petroleum equipments, Solvents and some food additives.
At present, our business have been involved in some industries like coatings&Paints, cosmetic&personal care, Flavor&Fragrancy, Pharmaceutical&food, Resins and drilling&oil recovery chemicals, etc. So you can find more items together from us conveniently which saves much time for you.
EXHIBITION/TRADE FAIR
Q: Are you factory or trading company?
We are manufacturer for our main products and also wholesale some chemicals.
Q: How long is your delivery time?
A: Generally it is about 15 days, if we have stock. If not, maybe need 20-30 days to arrange the shipping.
Q: Do you provide samples ? Is it free?
A: Yes, we could offer the sample for free, but hope the customer to pay the courier cost.
Q: What is your terms of payment ?
A: TT payment is favorable, LC at sight is fine. After we build good cooperation, we can discuss other payment terms.
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Audited Supplier 
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