
Paraformaldehyde CAS 30525-89-4 PFA



Factory Supply Paraformaldehyde CAS 30525-89-4 with Best Price
- Appearance: White powder
- Purity: 99. 0%min
- Stock: In stock
- Sample: Available
- Zhishang Chemical: Paraformaldehyde Supplier & Manufacturer
Paraformaldehyde: The Complete Guide
- Item 1: Basic Info
- Item 2: What is Paraformaldehyde?
- Item 3: Paraformaldehyde Uses
- Item 4: The Manager has Something to Say
- Item 5: Application of Paraformaldehyde
- Item 6: Preparation of Paraformaldehyde
- Item 7: Quality Control of Paraformaldehyde
- Item 8: Hot Sale Products
- Item 9: Get Paraformaldehyde Quotation
Paraformaldehyde for Sale
Basic Info of Paraformaldehyde
Chemical Name: | Paraformaldehyde |
Other Name: | Paraformaldehyde solution; paraformaldehyde sigma; para formaldehyde; paraformaldehyde pfa; Polyoxymethylene; PFA |
CAS: | 30525-89-4 |
EINECS: | 608-494-5 |
Type: | Inorganic salts; Pharmaceutical, pesticide, dye intermediates |
Molecular Formula: | (CH2O)n |
Molecular Weight: | 90.08 |
Melting point | 120-170 °C (lit.) |
Boiling point | 107.25°C (rough estimate) |
density | 0.88 g/mL at 25 °C (lit.) |
vapor density | 1.03 (vs air) |
vapor pressure | <1.45 mm Hg ( 25 °C) |
refractive index | 1.4540 (estimate) |
Fp | 158 °F |
storage temp. | 2-8°C |
solubility | chlorophenol above 70°C: soluble |
form | prilled |
color | White to off-white |
Odor | odor of formaldehyde |
PH | 5.5 (H2O, 20℃)(saturated solution) |
PH Range | 4 – 5.5 |
explosive limit | 7-73%(V) |
Water Solubility | sparingly soluble |
Stability: | Stable. Incompatible with strong acids, organic acids, strong oxidizing agents, oxides, alkalies, strong bases, amines. Combustible. Dust may form an explosive mixture with air. Liberates poisonous gases on combustion. |
Brand Name: | Zhishang Chemical |
Provide: | Paraformaldehyde MSDS; Paraformaldehyde COA |
What is Paraformaldehyde?
Paraformaldehyde (IUPAC named Polyoxymethylene, POM) is a polymer of formaldehyde (high molecular weight polyoxymethylene), with a general structural length of eight to one hundred units. Long-chain paraformaldehyde is commonly used in heat-resistant plastics, also known as polyoxymethylene plastics (POE, Derlin produced by DuPont). Paraformaldehyde decomposes quickly and releases slightly odorous formaldehyde.
Paraformaldehyde (molecular formula HO-(CH2O)n-H, where n is the level of polymerization, and also the worth of n ranges from 8 to 100), also referred to as polyoxymethylene, polyoxymethylene, polyacetal, solid formaldehyde, is a white Formed granule or powder, quickly soluble in hot water, somewhat soluble in cold water, soluble in dilute acid and water down alkali. Its injury to the body is the same as that of formaldehyde, and there is additionally a dust risk. Its chemical homes and uses are basically similar to formaldehyde, and also it is an exceptional replacement for commercial formaldehyde remedy. It is widely utilized in the synthesis that calls for making use of anhydrous formaldehyde as a basic material.
Paraformaldehyde Uses
- Paraformaldehyde is additionally made use of to crosslink proteins with DNA, such as in chip (chromatin immunoprecipitation), a strategy to figure out which part of DNA some healthy proteins bind to. Paraformaldehyde can change water-based formaldehyde to create resin bonding materials.
- Paraformaldehyde is not a fixative; It has to depolymerize right into formaldehyde in solution. In cell culture, a regular formaldehyde addiction procedure includes making use of a phosphate buffered saline (PBS) service of 4% formaldehyde on ice for 10 mins. In the prep work of histological as well as pathological specimens, 10% neutral buffered formalin (4% formaldehyde) is usually made use of for the addiction step for a minimum of 24 hr.
- When the paraformaldehyde is depolymerized, the created formaldehyde can be made use of as fumigant, anti-bacterial, bactericide and also fixative.
- Polyoxymethylene with lengthy chain length (high molecular weight) is made use of as polycarbonate, which is called polyoxymethylene plastic (POM, Delrin). It used to be made use of in the well known Sargenti origin canal therapy.
- Paraformaldehyde is primarily used in the manufacturing and use of herbicides, and is also utilized in the preparation of artificial resins (such as artificial horn products or man-made ivory) and adhesives.
- Paraformaldehyde is used in the pharmaceutical market (the energetic component of contraceptive lotion) as well as the disinfection of pharmacies, clothing as well as bed linen, etc. Paraformaldehyde can also be utilized as fumigant disinfectant, bactericide and insecticide.
The Manager has Something to Say

This is William, CEO of Zhishang Chemical Co., Ltd.
Welcome to visit our factory . As the top chemical manufacturer, we have been striving for product quality, innovation , R&D, and customer service for the past 7 years. In the next 10 years or even longer, we are committed to becoming the most reliable chemical supplier in the world , creating a well-known international brand trusted by customers, with the spirit of “one meter wide, ten thousand meters deep”, we continue to focus on product research and development, continue to focus on customer service, continue to improve the supply chain service system, to create a professional chemical supply service team, to achieve win-win long-term cooperation. Please feel free to contact us if you have any questions.
Contact Us
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- Phone: +86 176 5311 3209
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If you want to buy paraformaldehyde, pls contact us to get a free quote.
Application of Paraformaldehyde
Paraformaldehyde is solid formaldehyde with high formaldehyde web content in solid granular kind, which is convenient for storage space as well as transportation. It can become formaldehyde vapor at greater temperature, which is very easy to change high-concentration formaldehyde to take part in different responses, which is beneficial to chemical synthesis such as chemical sector, drug store as well as other commercial applications, specifically in the synthesis that calls for the use of anhydrous formaldehyde as resources, Wide variety of uses.
- Pesticides: Synthesis of acetochlor, butachlor and glyphosate, etc.
- Coatings: Synthesis of high-grade automobile paints.
- Resins: Synthesis of urea-formaldehyde material, phenolic resin, polyacetal material, melamine resin, ion exchange material, etc and different adhesives.
- Papermaking: artificial paper strengthening agent.
- Shop: sand casting release representative, synthetic shop adhesive.
- Tank farming: smoked Steam disinfectant.
- Organic basic materials: used for the prep work of pentaerythritol, trimethylolpropane, glycerol, acrylic acid, methyl acrylate, methacrylic acid, N-hydroxymethacrylamide, alkylphenol, methyl vinyl ketone, etc.
- Others: medication as well as sanitation.
Preparation of Paraformaldehyde
S1. Ingredients: First, add urotropine with a mass content of 0.8% to a 37% formaldehyde solution. Then, the 37% formaldehyde solution mixed with urotropine is heated to about 55 degrees, and the solution is continuously stirred to make the solution in a uniform state.
S2. Evaporation and concentration: The 37% formaldehyde solution is transported to a falling film evaporator and a steam separator in turn with a centrifugal pump for concentration. In the falling film evaporator, the 37% formaldehyde solution is concentrated to 58%, and in the evaporation separator The 58% formaldehyde solution is purely separated from the formaldehyde vapor; the formaldehyde solution with a concentration of 58% is transported from the steam separator to the concentration kettle for secondary concentration; the formaldehyde solution with a concentration of 58% is concentrated to the concentration again in the concentration kettle was 79%.
S3. Spray granulation: spray granulation is carried out in a spray granulation tower through two-stage concentrated formaldehyde solution. The above-mentioned concentrated 79% formaldehyde solution is transported to the spray granulation device through a high-pressure pump, and the material is fed from the top of the granulation tower, and nitrogen is introduced into the tower. Can prevent dust explosion and high oxygen concentration. In addition, the temperature in the spray tower was 120°C, the spray angle was kept at 30° from the vertical direction, and the temperature of the nitrogen gas introduced into the tower was 40°C. Finally, the gas discharged from the spray granulation tower is separated by a cyclone to remove the solid-phase paraformaldehyde carried by it, and the separated paraformaldehyde is sent to a vibrating far-infrared dryer to be dried to the finished paraformaldehyde. The gas from the cyclone separator can be sent to the washing, separation and purification equipment to remove the gas-phase formaldehyde component in the gas, and then discharged to the atmosphere, and the dried paraformaldehyde is further sent to the vibrating far-infrared dryer for drying;
S4. Far-infrared drying: The paraformaldehyde after spray granulation and solidification is dried in a vibrating far-infrared dryer to further remove the bound water contained in the paraformaldehyde. A two-stage heating method is adopted, including a first-stage drying section. and secondary drying section. The temperature of the primary drying section is controlled at 60° C., and it is dried to paraformaldehyde with a mass content of 90%. The temperature of the secondary drying section is controlled at 80°C, and the paraformaldehyde is finally dried to a finished product with a weight content of 93%. Finally, N2 with a temperature of 30°C is passed into the vibration far-infrared dryer as the cooling after drying. medium to cool the finished paraformaldehyde. In addition, the gas discharged from the vibrating far-infrared dryer can be separated and removed by the cyclone to remove the carried solid-phase paraformaldehyde, and the separated paraformaldehyde can directly enter the finished paraformaldehyde. The gas from the cyclone separator can enter the washing, separation and purification equipment together with the gas discharged from the cyclone separator used to process the gas of the granulation operation unit to remove the gas-phase formaldehyde components in the gas, and then discharge to the atmosphere.
Concentrate the aqueous solution containing 37% of formaldehyde in vacuo at 65°C to obtain a concentrated aqueous solution of paraformaldehyde containing 80% of formaldehyde, add the suspension at a concentration of 1.5%, and the manufacturing method of the suspension is to disperse the magnesium oxide fine powder into In methanol, obtain a methanol suspension with a magnesium oxide concentration of 50 ppm, then add it to an extruder to obtain 2-5mm particles, add the particles to a dryer, and dry for 60 minutes to make a solid content of 80% The paraformaldehyde can be made into 92% paraformaldehyde after drying for 120 minutes, and its output is 400kg/hr.
A process for producing paraformaldehyde, the detailed process steps are as follows:
1. The formaldehyde solution (45-50% by mass) passes through the intermediate tank under the condition of heat preservation throughout the whole process. The whole process is heated by steam to keep the temperature above 60 °C, and the formaldehyde solution in the intermediate tank is continuously pumped by the pump. Circulation to prevent formaldehyde polymerization; formaldehyde solution is pumped into the device area.
2. The formaldehyde solution (concentration by mass percentage 45-50%) enters the first-stage evaporator to evaporate the formaldehyde vapor. The first-stage evaporator is a tubular evaporator, and the evaporation temperature is kept between 75-85 °C; the formaldehyde vapor enters the first-stage separator, In the case of ensuring that the temperature of the material does not decrease, the separation process maintains a vacuum condition. The 7% dilute aldehyde is taken away by vacuuming and sent to the absorption device, and the separated concentrated aldehyde (75-85% by mass) is pumped into the second-stage concentration device.
3. The second-stage concentration device is a steam-heated thin-film evaporator, and the formaldehyde solution (with a mass percentage concentration of 75-85%) is sent to the second-stage concentration thin-film evaporator for second-stage concentration. The thin film evaporator is heated by steam, and the interior is stirred evenly by a stirring paddle to prevent the polymerization of concentrated aldehydes. Vacuum conditions were maintained throughout the concentration process. The concentrated aldehyde concentration after concentration is 90-95% (mass percentage), wherein 34% of the dilute aldehyde is taken away by vacuuming and sent to the absorption device. Concentrated formaldehyde is sent to the spray granulation device through a pump;
4. The concentrated formaldehyde solution in the second stage is spray-dried in a spray granulation tower to further remove the free moisture that is easier to remove in the paraformaldehyde. The concentrated concentrated aldehyde in the second stage should be pressurized into the spray granulation device through a high-pressure pump. The spray granulation device used is a spray granulation tower. The material is fed from the top of the spray granulation tower. Precise adjustment of temperature and spray angle, the temperature is 90-150°C, and the spray angle is kept at 0-45° to the vertical direction to produce paraformaldehyde with the most optimized particle size, viscosity and continuity. The entire spraying process must be carried out in nitrogen flow, which not only plays the role of drying, but also prevents dust explosion and high oxygen concentration. Among them, the dilute formaldehyde gas and its dilute aldehyde powder are sent to the absorption tower for absorption, and the dried paraformaldehyde enters the fluidized bed drying device;
5. The paraformaldehyde after spray granulation and solidification enters the fluidized bed drying device to further remove the bound water contained in the paraformaldehyde. The fluidized bed drying device is a vibrating fluidized bed, and the dried paraformaldehyde passes through a bucket. The hoist enters the PF middle tank and is ready for packaging.
Reference
- Paraformaldehyde – WikiPedia
- Paraformaldehyde – Dover Chemical”.
- Cogliano, Vincent; Grosse, Yann; Baan, Robert; Straif, Kurt; Secretan, Béatrice; Ghissassi, Fatiha El (September 2004). “Advice on formaldehyde and glycol ethers”.
Paraformaldehyde Supplier and Manufacturer
As a paraformaldehyde supplier and manufacturer with a strict standard product quality system certificate, Zhishang Chemical has long been providing the best paraformaldehyde raw materials to customers all over the world.
Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.
If you have a demand for paraformaldehyde and related products, please contact our service staff Zhishang Chemical – White directly, and we will provide you with high-quality products at the best price.
Pre-Sales Service
* Prompt reply and 24 hours online, professional team to provide the best price and high-quality product.
* Sample testing support.
* Every batch of products will be tested to ensure its quality.
* The packing also can be according to the customers` requirement.
* Any inquiries will be replied to within 24 hours.
* We provide a Commerical Invoices, Packing Lists, Bills of loading, COA, Health certificates, and Origin certificates. If your markets have any special requirements, let us know.
After-Sales Service
* The fact of logistics information monitoring.
* Any questions about the product can be consulted at any time.
* Product has any problem can return.
Do you accept sample order?
We will make samples before mass production, and after the sample is approved, we’ll begin mass production. Doing 100% inspection during production, then doing random inspection before packing.
What’s your MOQ?
Our MOQ is 1kg. But usually we accept less quantities, such as 100g on the condition that the sample charge is 100% paid.
Is there a discount?
The different quantity has different discount.
HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?
You can get free samples for some products, you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests, we will manufacture the products according to your requests.
Do you supply product report?
Yes. We’ll give you product analysis report before shipping.
1. ≤50kg, Express delivery recommended, usually called DDU service;
2. ≤500kg, Air shipping recommended, usually called FOB, CFR, or CIF service;
3. >500kg, sea shipping recommended, usually called FOB, CFR, or CIF service;
4. For high-value products, please select air shipping and express delivery for safe.
Quality Control of Paraformaldehyde

