Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid
hexamethylenediamine-N,N,N',N'-tetrakis-(methylphosphon.ac.)
CAS: 23605-74-5
Molecular Formula: C10H28N2O12P4
Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid - Names and Identifiers
| Name | hexamethylenediamine-N,N,N',N'-tetrakis-(methylphosphon.ac.) |
| Synonyms | hdtmp HDTMPA HMDTMPA dequest2051 DEQUEST 2054(R) dequest2051deflocculantandsequestrant Hexamethy lenediaminetetra(methylenephosphonicacid) HexaMethyleneDiamineTetra (MethylenePhosphonic Acid) Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid hexamethylenediamine-N,N,N',N'-tetrakis-(methylphosphon.ac.) HEXAMETHYLENEDIAMINE-N,N,N',N'-TETRAKIS(METHYLPHOSPHONIC ACID) (1,6-hexanediylbis(nitrilobis(methylene)))tetrakisphosphonicacid [1,6-hexanediylbis[nitrilobis(methylene)]]tetrakis-phosphonicaci (1,6-hexanediylbis(nitrilobis(methylene)))tetrakis-phosphonicaci [hexane-1,6-diylbis(nitrilodimethanediyl)]tetrakis(phosphonic acid) Hexamethylenediamine-N,N,N,N-tetrakis(methylphosphonic acid) solution |
| CAS | 23605-74-5 |
| EINECS | 245-781-0 |
| InChI | InChI=1/C10H28N2O12P4/c13-25(14,15)7-11(8-26(16,17)18)5-3-1-2-4-6-12(9-27(19,20)21)10-28(22,23)24/h1-10H2,(H2,13,14,15)(H2,16,17,18)(H2,19,20,21)(H2,22,23,24) |
Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid - Physico-chemical Properties
| Molecular Formula | C10H28N2O12P4 |
| Molar Mass | 492.23 |
| Density | 1.4353 (rough estimate) |
| Melting Point | 242 °C |
| Boling Point | 546.04°C (rough estimate) |
| Flash Point | 477.1°C |
| Vapor Presure | 3.27E-33mmHg at 25°C |
| pKa | 0.70±0.10(Predicted) |
| Refractive Index | 1.5300 (estimate) |
| Use | HDTMPA is a white crystalline powder at room temperature, slightly soluble in water, and its solubility is less than 5% at room temperature. HDTMPA can inhibit the formation of various scales (such as calcium carbonate scale, calcium sulfate scale, barium sulfate scale and iron oxide scale), but it is mainly used to inhibit calcium sulfate and barium sulfate scale in water treatment. In a variety of organic phosphoric acid, its performance of inhibiting calcium sulfate scale is the best, not only the scale inhibition rate is high, and the effective time is long, so it is especially suitable for the extrusion treatment of oil fields. HDTMPA can also be used in boiler water treatment. |
Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid - Risk and Safety
| WGK Germany | 1 |
| RTECS | SZ8560500 |
Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid - Nature
Open Data Verified Data
white powder, slightly soluble in water, room temperature water solubility of less than 5%. With the formation of strong alkali soluble in water Salt, hydrolysis resistance.
Last Update：2024-01-02 23:10:35
Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid - Preparation Method
Open Data Verified Data
anhydrous hexamethylene diamine, formaldehyde, phosphorus trichloride reflux should be liquid. This solution is slowly dropped into anhydrous ethanol, that is, there is a white precipitation, filtered ethanol, that is, a solid product.
Last Update：2022-01-01 09:28:56
Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid - Use
Open Data Verified Data
can inhibit the formation of various scales (such as calcium carbonate scale, calcium sulfate scale, barium sulfate scale and iron oxide scale, etc.), but in water treatment is mainly used to inhibit calcium sulfate and barium sulfate scale. Among all kinds of organic phosphonic acids, the performance of inhibiting calcium sulfate scale is the best, not only the scale inhibition rate is high, and the effective time is long, so it is especially suitable for the extrusion treatment of oil fields. It can also be used in boiler water treatment.
Last Update：2022-01-01 09:28:57
Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid - Safety
Open Data Verified Data
for a 25% aqueous suspension, rat oral LD50: 7940mg/kg. It has a stimulating effect on the eyes and skin. Contact with eyes and skin should be avoided. Staff should be protected. If the eyes and skin are touched, they should be immediately rinsed with plenty of water.
Last Update：2022-01-01 09:28:58
Hexamethylenebis(Nitrilodimethylene)Tetraphosphonic Acid - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | HDTMPA is a white crystalline powder at room temperature, slightly soluble in water, and its solubility is less than 5% at room temperature. HDTMPA can inhibit the formation of various scales (such as calcium carbonate scale, calcium sulfate scale, barium sulfate scale and iron oxide scale, etc.), but it is mainly used to inhibit calcium sulfate and barium sulfate scale in water treatment. Among all kinds of organic phosphoric acid, its calcium sulfate scale resistance performance is the best, not only has high scale inhibition rate and long effective time, so it is especially suitable for extrusion treatment in oil fields. HDTMPA can also be used in boiler water treatment. Mainly used to synthesize organosilicon compounds |
| production method | 1. add 1mol of anhydrous hexanadiamine, 8mol(144g) of deionized water and 4mol of formaldehyde to the reaction bottle equipped with sealed stirrer, reflux condenser and dropping funnel, stir and cool to below 30 ℃, slowly add 4mol of phosphorus trichloride, control the reaction temperature at 30~40 ℃, and hydrogen chloride will escape in the reaction. Keep the molar ratio of phosphorus trichloride to 1:4.5 in the system. When phosphorus trichloride is added, the temperature is slowly increased by 110 ℃, and the liquid is obtained by reflux reaction. This liquid can be used as a scale inhibitor for circulating cooling water. If solid products are prepared, the reaction solution can be slowly dropped into absolute ethanol, that is, white precipitate is precipitated, and ethanol is filtered out to obtain solid products. |
Last Update：2024-04-10 22:29:15
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