6419-19-8
Nitrilotrimethylene Triphosphonic Acid
CAS: 6419-19-8
Molecular Formula: C3H12NO9P3
6419-19-8 - Names and Identifiers
6419-19-8 - Physico-chemical Properties
| Molecular Formula | C3H12NO9P3 |
| Molar Mass | 299.05 |
| Density | 1.3g/mLat 25°C |
| Melting Point | ~215°C (dec.) |
| Boling Point | 746.2±70.0 °C(Predicted) |
| Flash Point | 405.1°C |
| Water Solubility | 500g/L at 20℃ |
| Solubility | Water (Slightly, Heated) |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Solid |
| Color | White |
| BRN | 1715724 |
| pKa | 0.56±0.10(Predicted) |
| PH | 0.46 |
| Storage Condition | Sealed in dry,Room Temperature |
| Stability | Stable. Incompatible with bases, strong oxidizing agents. |
| MDL | MFCD00002138 |
| Physical and Chemical Properties | Miscible with water. At 200 ℃, it has excellent scale inhibition performance, good stability and excellent effect on calcium carbonate scale. It can form stable complexes with iron, copper, aluminum, zinc and other metal ions, and has good dispersion performance. When the dosage is more than 40ppm, it also has good corrosion inhibition performance. |
| Use | Cooling water system, oil pipeline and boiler scale, it can be used as high hardness, high salinity and other poor water quality of the oil pipeline scale inhibitor. |
6419-19-8 - Risk and Safety
| Risk Codes | R36 - Irritating to the eyes R34 - Causes burns R35 - Causes severe burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S25 - Avoid contact with eyes. S44 - S36 - Wear suitable protective clothing. |
| UN IDs | 3265 |
| WGK Germany | 1 |
| RTECS | SZ9860000 |
| FLUKA BRAND F CODES | 3-9 |
| HS Code | 29319090 |
| Hazard Class | 8 |
| Packing Group | III |
6419-19-8 - Nature
Open Data Verified Data
colorless or light yellow transparent liquid, or white granular solid. Melting Point 212 °c (decomposition). The relative density (20 ℃) ranged from 1. 30 to 1. 40. Soluble in water, ethanol, acetone, etc. Chemical stability, good thermal stability, and sulfuric acid boiling is not separated, dry decomposition temperature of 200~212 ℃, not easy to hydrolysis.
Last Update：2024-01-02 23:10:35
6419-19-8 - Preparation Method
Open Data Verified Data
using formaldehyde, ammonium chloride and phosphorus trichloride as raw materials, hydrogen chloride was recovered by one-step reaction, and the product was obtained by filtration.
Last Update：2022-01-01 09:28:49
6419-19-8 - Introduction
Easily soluble in water, easy to absorb moisture, easy to transport and use, especially suitable for severe winter areas. Due to its high purity, it can be used as metal chelating agent and metal surface treatment agent in textile printing and dyeing industry.
Last Update：2022-10-16 17:27:41
6419-19-8 - Use
Open Data Verified Data
It can be used as a scale inhibitor for open circulating cooling water system and boiler water. It can also be used as a scale inhibitor for oil field sewage reinjection system with high hardness and poor water quality and for power plant condenser cooling water system. With good chelation, low limit inhibition, etc., can prevent the formation of scale in water scale salt. Used for circulating cold water, oil field water injection, water treatment of water-containing pipeline. It can form multiple ring chelates with metal ions such as calcium and magnesium, and disperse in water in loose form, but its inhibitory effect on calcium phosphate is not as good as that of ethylenediamine tetramethylene phosphonic acid. It can also be used as a metal cleaning agent to remove grease on metal surfaces, and also used as an additive for detergents, a metal ion masking agent, a cyanide-free electroplating additive, an extractant for precious metals, and the like.
Last Update：2022-01-01 09:28:49
6419-19-8 - Safety
Open Data Verified Data
rat oral LDsa of a 50% aqueous solution of aminotrimethylenephosphonic acid: 7300mglkg can be considered non-toxic. Amino trimethylene phosphonic acid showed low toxicity to fish, but it had slight irritation to skin and moderate irritation to eyes in rabbits. Therefore, operators should wear long-sleeve work clothes, rubber gloves and protective glasses. If contact with the skin or eyes, rinse with plenty of water. The chemical oxygen demand of so% aqueous solution is 0. 234mg/mg, and the biological oxygen demand is close to zero, so it has little effect on the ecological environment. Can be loaded into a plastic-lined iron drum for transport. During storage, ventilation should be maintained to avoid exposure to the sun.
Last Update：2022-01-01 09:28:50
6419-19-8 - Reference Information
| LogP | -3.5 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | chloro-trimethylene phosphonic acid, also known as amino-trimethylene phosphonic acid (ATMP), has good chelation, low limit inhibition and lattice distortion effect. Scale formation, particularly calcium carbonate scale formation, can be prevented by scaling salts in water. Amino trimethylene phosphonic acid is chemically stable in water and is not easily hydrolyzed. When the concentration is high in water, it has good corrosion inhibition effect. |
| Application | chloro-trimethylene phosphonic acid is used in the recirculating cooling water system of thermal power plant, refinery and oil field reinjection water system. Can play a role in reducing metal equipment or pipeline corrosion and scaling. Amino trimethylene phosphonic acid is used as a metal ion chelating agent in textile printing and dyeing and other industries, and can also be used as a metal surface treatment agent. |
| preparation | (1) 15g of yellow phosphorus is introduced into a closed reactor for nitrogen deaeration;(2) after heating to 45 ℃, a small amount of high purity oxygen is introduced into the reaction kettle, which is not completely burned under insufficient oxygen, and phosphorus trioxide (P2O3) is obtained in the closed reaction kettle;(3) add 90g of water and 40g of ammonium chloride to the closed reaction kettle, stir and mix for 60min at 20 ℃, add 100g of formaldehyde solution with mass fraction of 37% Dropwise after stirring, and then heat to 50 ℃, reaction 2H, then 1.5 ℃/min to 110 ℃, reaction 1H;(4) after the reaction is complete, control the temperature of 125 ℃ for distillation, chloro-trimethylene phosphonic acid can be obtained when no material is distilled out. |
| Use | ATMP is chemically stable in water and is not susceptible to hydrolysis. When the concentration of amino trimethylene phosphonic acid in water is high, it has a good corrosion inhibition effect. ATMP is used for recirculating cooling water in thermal power plants, oil refineries and oil field reinjection systems. Amino trimethylene phosphonic acid can act to reduce corrosion and scaling of metal equipment or pipelines. ATM is used as a metal ion chelating agent in textile printing and dyeing and other industries, and can also be used as a metal surface treatment agent. Solid crystalline powder, soluble in water, easy to absorb moisture, easy to transport and use, especially suitable for winter cold area. Due to the high purity of ATMP, it can be used as metal chelating agent and metal surface treatment agent in textile printing and dyeing industry. ATMP has good integration, low limit inhibition and lattice distortion. Scale formation, particularly calcium carbonate scale formation, can be prevented by scaling salts in water. ATMP is chemically stable in water and is not easily hydrolyzed. When the concentration in water is high, ATMP has good corrosion inhibition effect. It is used in circulating cooling water of thermal power plant, refinery and oil field reinjection system. Can play a role in reducing metal equipment or pipeline corrosion and scaling. ATMP is used as a metal ion chelating agent in textile printing and dyeing and other industries, and can also be used as a metal surface treatment agent. ATMP solid is crystalline powder, soluble in water, easy to absorb moisture, easy to transport and use, especially suitable for winter cold area. Due to its high purity, it can be used as metal chelating agent and metal surface treatment agent in textile printing and dyeing industry. The Scale Inhibitor of cooling water system, oil pipeline and boiler can be used as Scale Inhibitor of oil pipeline with high hardness, high salinity and other poor water quality. scale and corrosion inhibitors for cooling water, boiler water and oilfield water treatment circulating cooling for thermal power plants and refineries |
| Water treatment agent | amino trimethylene phosphonic acid (aminotrimethylene phosphonic acid) solid is crystalline powder, soluble in water, easy to absorb moisture, it has good chelation, low limit inhibition and lattice distortion. It has excellent scale inhibition effect below 200 ℃, low toxicity, good thermal stability, can dissociate into six positive and negative ions in water, and can be applied to iron, copper, aluminum, zinc, calcium, magnesium and other metal ions chelate to form a stable complex, especially for carbonate scale. And with polyphosphate, polycarboxylate, nitrite has good synergistic ability. There is a good corrosion inhibition in 40mg/L. aminotrimethylenephosphonic acid (ATMP) is a methylene phosphonic acid type compound, which is one of the agents used earlier in water treatment agents. Because it can form double five-membered ring chelate with Ca2 ,Mg2 ,Zn2 ,Fe2 and other metal ions in water, it has good effect of inhibiting calcium carbonate scale and corrosion inhibition performance on carbon steel. ATMP is an organic phosphorus acid scale inhibitor, which is not easy to hydrolyze and has a temperature resistance of more than 100°C. Dosage is relatively low, has better anti-scaling effect. |
| method of use | amino trimethylene phosphonic acid ATM is often combined with other organic phosphoric acid, polycarboxylic acid or salt into organic alkaline water treatment agent, for a variety of different water quality under the circulating cooling water system. The dosage of 1~20mg/L is better, when used as corrosion inhibitor, the dosage is 20~60mg/L. Amino trimethylene phosphonic acid is stored in a cool and ventilated place indoors, moisture-proof and protected from sun exposure. amino trimethylene phosphonic acid is often combined with other organic phosphonic acids, polycarboxylic acids or salts to form organic water treatment agents, which are used in circulating cooling water systems under different water quality conditions. The dosage of 1~20mg/L is better; When used as corrosion inhibitor, the dosage is 20~60mg/L. Amino trimethylene phosphonic acid is acidic, attention should be paid to labor protection during operation, should avoid contact with skin, eyes and so on, and should be washed with plenty of water immediately after contact. |
| amino trimethylene phosphonic acid (aminotrimethylene phosphonic acid) applications | used in thermal power plants, refineries, petrochemical, circulating cooling water of chemical fertilizer plant and oilfield reinjection water system. It is especially suitable for systems with high calcium hardness and low concentration ratio, such as power plants. And large hardness, high salinity, poor water quality conditions of the oil pipeline Scale Inhibitor, can play a role in reducing corrosion and scaling of metal equipment and pipelines. It is used as a metal ion chelating agent and a metal surface treatment agent in textile printing and dyeing and other industries. |
| reference quality standard | project indicators in accordance with HG/T 2841-1997 in accordance with HG/T2841-2005 appearance colorless or light yellow transparent liquid white crystalline powder active ingredient (in ATMP)% ≥ 50.0 50.0 95.0 amino trimethylenephosphonic acid content% ≥ -- 40.0 88.0 phosphorous acid (as PO33-)% ≤ 5.0 3.5 -- phosphoric acid (as PO43-)% ≤ 1.0 0.8 0.8 chloride (as Cl-)% ≤ 3.5 2.0 1.0 iron (as Fe2 +) content mg/L ≤ -20.0 20.0 density (20 ℃)g/cm3 ≥ 1.28 1.30-pH(1% aqueous solution) 1.5-2.5-1.5-2.5 2.0 |
Last Update：2024-04-10 22:29:15
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