polyethylenimine(20,000)
Poly(ethylenimine)
CAS: 9002-98-6
Molecular Formula: C2H5N
polyethylenimine(20,000) - Names and Identifiers
polyethylenimine(20,000) - Physico-chemical Properties
| Molecular Formula | C2H5N |
| Molar Mass | 43.07 |
| Density | 1.030g/mLat 25°C |
| Melting Point | 59-60°C |
| Boling Point | 250°C(lit.) |
| Flash Point | >230°F |
| Water Solubility | Soluble in water. |
| Vapor Presure | 9 mmHg ( 20 °C) |
| Appearance | Liquid |
| Specific Gravity | 1.045 (20/4℃) |
| Color | Pale yellow |
| PH | pH(50g/l, 25℃) : 10～12 |
| Storage Condition | 2-8°C |
| Sensitive | Hygroscopic |
| Refractive Index | n20/D 1.5290 |
| Physical and Chemical Properties | This product is a colorless and highly viscous liquid. Soluble in water, ethanol, hygroscopic, insoluble in benzene and acetone. It will produce precipitation when it meets sulfuric acid with pH below 2.4. The aqueous solution is positively charged, and formaldehyde is added to produce condensation. |
polyethylenimine(20,000) - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R43 - May cause sensitization by skin contact R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R36/38 - Irritating to eyes and skin. |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S36/37 - Wear suitable protective clothing and gloves. S37 - Wear suitable gloves. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | UN 3082 9 / PGIII |
| WGK Germany | 2 |
| RTECS | TQ7917000 |
| FLUKA BRAND F CODES | 10-34 |
| TSCA | Yes |
| HS Code | 39019090 |
polyethylenimine(20,000) - Reference
| Reference Show more | 1. [IF=5.373] Han Yan et al."A label-free electrochemical immunosensing platform based on PEI-rGO/Pt@Au NRs for rapid and sensitive detection of zearalenone."Bioelectrochemistry. 2022 Feb;143:107955 |
polyethylenimine(20,000) - Nature
Open Data Verified Data
colorless or light yellow viscous liquid, hygroscopic, soluble in water, ethanol, insoluble in benzene, acetone. Precipitation occurs when it meets sulfuric acid with a pH of less than 2.4. The aqueous solution was positive and formaldehyde was added to produce coagulation. Gelation occurs in the presence of an acid. Commercially available products are generally aqueous solutions having a concentration of 20% to 50%.
Last Update：2024-01-02 23:10:35
polyethylenimine(20,000) - Preparation Method
Open Data Verified Data
first, ethyleneimine was obtained by esterification of ethanolamine with sulfuric acid. The ethyleneimine may be further polymerized under acidic conditions.
Last Update：2022-01-01 09:30:54
polyethylenimine(20,000) - Use
Open Data Verified Data
The degree of polymerization used in the paper industry is about 1 00. Polyethyleneimine has high reaction activity, can react with the hydroxyl group in cellulose and cross-linking polymerization, so that the wet strength of the paper. The presence of any acid, base, and aluminum sulfate will affect the wet strength and retention. As the wet strength agent of the respiratory paper without sizing, the retention agent and the beating agent in the paper making process can reduce the beating degree of the pulp, improve the dehydration ability of the paper, and speed up the drainage of the pulp, the fine fibers in white water are easy to flocculate. It can also be used to treat cellophane, reduce wetting deformation of the paper, etc. Polyethyleneimine can also be used for fiber modification, printing and dyeing auxiliaries, ion exchange resins, etc. It has a strong binding force to acid dyes and can be used as a fixing agent for acid dye dyeing paper.
Last Update：2022-01-01 09:30:54
polyethylenimine(20,000) - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | as a wet strength agent for non-sized respiratory paper, retention and beating agents in the papermaking process can reduce the degree of pulp beating. Improve the ability of paper dehydration. The paper dryness was increased by 1% to 4%. Production capacity increased by 5%~ 20%. 1, high adhesion and adsorption of amino group can react with carboxyl group to generate hydrogen. The amino group can react with the carboxyl group to form the ion. The amino group can react with the carbonyl group to form a covalent bond. Polyethyleneimine has a polar group (amino group) and a hydrophobic group (vinyl group) structure, and can be combined with different substances. By using these comprehensive binding forces, it can be widely used in the fields of ink, paint, binder and the like. 2, high cationic polyethyleneimine in water to polymerize the presence of cations, can neutralize and adsorb all anionic substances, but also can be heavy metal ions. With its high cationic nature, it can be applied in the field of papermaking water treatment, electroplating solution and dispersant. 3. Reactive polyethyleneimine can easily react with epoxy, acid, isocyanate compound and acid gas due to its strong reactive primary and secondary amines. This property can be used as an epoxy resin reactant, an aldehyde adsorbent and a dye fixing agent. |
| production method | preparation of ethylenimine 300kg of ethanolamine and 50kg of water were added to a reaction pot, 50 kg of concentrated sulfuric acid was slowly added dropwise with stirring, and the temperature was controlled at 10 to 30 ° C. During the dropwise addition of sulfuric acid. After the completion of the drop, the temperature was maintained and stirred for 1 h. The temperature was further increased to 50 ° C., and the temperature was dehydrated under reduced pressure until crystals were precipitated. The distillation under reduced pressure was stopped. The crystals were cooled and filtered. The filter cake was washed with a small amount of water and dried to obtain ammonia ethanol hydrogen sulfate. This was transferred to a hydrolysis vessel, 30% of a 200 aqueous NaOH solution was added, and after hydrolysis at 100 ° C. The azeotrope of ethyleneimine and water was distilled off. Polymerization the aqueous solution of ethyleneimine prepared as described above is introduced into a polymerization vessel, hydrogen chloride and carbon dioxide are introduced, and ethyleneimine is polymerized to obtain polyethyleneimine under acid catalysis. |
Last Update：2024-04-09 19:05:15
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