Quick Search
DIMETHYLCYCLOHEXYLAMINE
Dimethylcyclohexylamine is a strongly basic, clear, colorless-to-straw liquid tertiary amine. The material has a characteristic amine odor. Dimethylcyclohexylamine will darken on standing, with no effect on reactivity. It is readily soluble in most polyols and organic solvents but is essentially insoluble in water. Dimethylcyclohexylamine is a tertiary amine used primarily to promote the urethane (polyol-isocyanate) reaction in a wide range of rigid foam applications.
Appearance: N,N-Dimethylcyclohexylamine is colourless liquid, with characteristic odour and good miscibility with most organic solvents. It has vigorous reaction with organic acides.
Application areas: Used especially as catalyst for polyurethane systems, for production of surface materials, fillers of biding agents, sealing agents, softeners.
Cas No.: 98-94-2
EC No.: 202-715-5
SYNONYMS:
N,N-DIMETHYLCYCLOHEXYLAMINE, N,N-Dimethylcyclohexanamine, 98-94-2, Cyclohexyldimethylamine, Dimethylcyclohexylamine, N-Cyclohexyldimethylamine, Cyclohexanamine, N,N-dimethyl-, Polycat 8, (Dimethylamino)cyclohexane, N,N-Dimethylaminocyclohexane, N,N-Dimethyl-N-cyclohexylamine, Cyclohexylamine, N,N-dimethyl-, Dimethylaminocyclohexane, NSC 163904, HSDB 5323, UNII-N1H19E7HTA, EINECS 202-715-5, MFCD00003844, UN2264, BRN 1919922, N,N-dimethyl-cyclohexylamine, N, N-Dimethylcyclohexylamine, N1H19E7HTA, CHEBI:59022, Dimethylcyclicsiloxane hydrolyzate, N,N-Dimethylcyclohexylamine, 99%, cyclohexyl(dimethyl)ammonium, polycat-8, DMCHA, cyclohexyl-dimethylamine, dimethyl cyclohexylamine, dimethyl cyclohexyl amin, ACMC-209sbc, DSSTox_CID_6633, Cyclohexanamine,N-dimethyl-, Cyclohexylamine,N-dimethyl-, EC 202-715-5, DSSTox_RID_78169, N,N-dimethylcyclohexyl amine, DSSTox_GSID_26633, SCHEMBL15595, N-cyclohexyl-N,N-dimethylamine, CHEMBL3186662, DTXSID9026633, CTK3I7467, KS-00000WWP, WLN: L6TJ AN1 & 1, STR02891, ZINC1640007, Tox21_201360, ANW-40966, NSC163904, SBB060234, AKOS015850797, MCULE-9944021193, NSC-163904, UN 2264, CAS-98-94-2, NCGC00249031-01, NCGC00258912-01, LS-57622, DB-002820, D0705, FT-0629528, ST45255434, Dimethylcyclohexylamine [UN2264] [Corrosive], Dimethylcyclohexylamine [UN2264] [Corrosive], 104104-EP2295438A1, 104104-EP2302015A1, 119586-EP2275411A2, 119586-EP2298731A1, W-100060, Q25945666, F0001-2323, (Dimethylamino)cyclohexane 104104-EP2295438A1 104104-EP2302015A1 119586-EP2275411A2 119586-EP2298731A1 98-94-2 ACMC-209sbc AKOS015850797 ANW-40966 BRN 1919922 CAS-98-94-2 CHEBI:59022 CHEMBL3186662 CTK3I7467 Cyclohexanamine, N,N-dimethyl- Cyclohexanamine,N-dimethyl- cyclohexyl(dimethyl)ammonium Cyclohexylamine, N,N-dimethyl- Cyclohexylamine,N-dimethyl- Cyclohexyldimethylamine cyclohexyl-dimethylamine D0705 DB-002820 dimethyl cyclohexyl amin dimethyl cyclohexylamine Dimethylaminocyclohexane Dimethylcyclicsiloxane hydrolyzate Dimethylcyclohexylamine Dimethylcyclohexylamine [UN2264] [Corrosive] Dimethylcyclohexylamine [UN2264] [Corrosive] DMCHA DSSTox_CID_6633 DSSTox_GSID_26633 DSSTox_RID_78169 DTXSID9026633 EC 202-715-5 EINECS 202-715-5 F0001-2323 FT-0629528 HSDB 5323 KS-00000WWP LS-57622 MCULE-9944021193 MFCD00003844 N, N-Dimethylcyclohexylamine n,n-dimethyl cyclohexylamine N,N-Dimethylaminocyclohexane N,N-Dimethylcyclohexanamine N,N-dimethylcyclohexyl amine N,N-DIMETHYLCYCLOHEXYLAMINE N,N-dimethyl-cyclohexylamine N,N-Dimethylcyclohexylamine, (Cyclohexyldimethylamine) N,N-Dimethylcyclohexylamine, 99% N,N-Dimethylcyclohexylamine,(Cyclohexyldimethylamine) N,N-Dimethylcyclohexylamine/Cyclohexyldimethylamine N,N-Dimethyl-N-cyclohexylamine N1H19E7HTA NCGC00249031-01 NCGC00258912-01 N-Cyclohexyldimethylamine N-cyclohexyl-N,N-dimethylamine NS00008221 NSC 163904 NSC163904 NSC-163904 Polycat 8 polycat-8 Q25945666 SBB060234 SCHEMBL15595 ST45255434 STR02891 Tox21_201360 UN 2264 UN2264 UNII-N1H19E7HTA W-100060 WLN: L6TJ AN1 & 1 ZINC1640007
IUPAC names:
Ciclohexildimetilamina, Cyclohexanamine, N,N- dimethyl, Cyclohexanamine, N,N-dimethyl-, Cyclohexyldimethylamine, Cyclohexyldimethylamine, Cyclohexyldimethylamine, Cyklohexyldimethylamin, Dimethylcyclohexylamine, DIMETHYLCYCLOHEXYLAMINE (DMCHA), DMCHA, N,N-Dimethyl cyclohexyl amine, N,N-Dimethylcyclohexanamine, N,N-dimethylcyclohexanamine, N,N-Dimethylcyclohexylamine, N,N-dimethylcyclohexylamine, N,N-dimethylcyclohexylamine
Trade names:
N,N-dimethylcyclohexylamine
Alternate Chemical Names:
CYCLOHEXYLAMINE, N,N-DIMETHYL, CYCLOHEXYLAMINE, N,N-DIMETHYL-, CYCLOHEXYLDIMETHYLAMINE, (DIMETHYLAMINO)CYCLOHEXANE, DIMETHYLCYCLOHEXYLAMINE, KL 3, KL 3 (AMINE), N,N-DIMETHYLAMINOCYCLOHEXANE, N,N-DIMETHYLCYCLOHEXANAMINE, N,N-DIMETHYLCYCLOHEXYLAMINE, N,N-DIMETHYLCYCLOHEXYLAMINE, [LIQUID], N,N-DIMETHYLCYLOHEXYLAMINE, N-CYCLOHEXYLDIMETHYLAMINE, N-DIMETHYLCYCLOHEXANAMINE, NIAX C 8, PC CAT DMCHA, PC CAT NP 33R, POLYCAT 8, TOYOCAT DMCH, WANDAMIN DMCA, WONDAMINE DMCA
DIMETHYLCYCLOHEXYLAMINE:
Dimethylcyclohexylamine is a strongly basic, clear, colorless-to-straw liquid tertiary amine. The material has a characteristic amine odor. Dimethylcyclohexylamine will darken on standing, with no effect on reactivity. It is readily soluble in most polyols and organic solvents but is essentially insoluble in water. Dimethylcyclohexylamine is a tertiary amine used primarily to promote the urethane (polyol-isocyanate) reaction in a wide range of rigid foam applications.
Formula: C8H17N
Molecular mass: 127.26
Boiling point: 162-165°C
Melting point: -60°C
Relative density (water = 1): 0.85
Solubility in water, g/100ml: 20
Vapour pressure, kPa at 25°C: 0.4
Relative vapour density (air = 1): 4.4
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: 42.2°C c.c.
Auto-ignition temperature: 215°C
Explosive limits, vol% in air: 3.6-19
N,N-Dimethylcyclohexylamine is a kind of tertiary amine catalyst with strong alkalinity and moderate activity, widely used in rigid polyurethane foam in the world. It is especially suitable to make two components system and no need to add organotin in system polyol. It has moderate activity, strong stability, good adjustability and can be stored for a long time. When used in system polyol for the high capacity refrigerator, it can improve the foam fluidity. Stored in cool and well-ventilated storeroom. Keep away from fire and heat source. Temperature of storeroom should be no high than 30℃. Should be separately stored from oxidizing agent and acids, avoid mixing storage. Use explosion proof lighting and ventilation facilities. Forbidden to use mechanical equipment and tools easy to cause sparkle.There should be emergency treatment equipment for leakage and proper material for collecting in the storage area.
N,N-Dimethylcyclohexylamine (DMCHA) is mainly used as catalyst in rigid polyurethane foam plastics for refrigerator, panel, spray and casting. It has balanced catalytic performance in foam reaction and gel reaction of rigid foam. It has stronger catalytic property in the reaction of water and isocyanate, also has moderate catalytic in the reaction of polyol and isocyanate. It's a strong initial catalyst in the foam reaction. In addition to polyurethane rigid foam, N,N-Dimethylcyclohexylamine can also be used as aided catalyst in polyurethane molding soft foam, semi-rigid foam.
A method has been developed for the collection on a reactive surface and subsequent analytical determination of airborne N,N-dimethylcyclohexylamine (DMCA). DMCA from ambient or test atmosphere is collected on a Tenax® sorbent sample tube treated with hydrochloric acid (HCl) using a low flow, personal sampling pump. The Tenax sorbent sample tube is desorbed with tetrahydrofuran (THF) and sodium hydroxide (NaOH) and the resulting solution is analyzed on a gas chromatograph/mass spectrometer (GC/MS) using selected ion monitor. A switchable hydrophilicity solvent (SHS) was studied for its effectiveness at extracting lipids from freeze-dried samples of Botryococcus braunii microalgae. The SHS N,N-dimethylcyclohexylamine extracted up to 22 wt.% crude lipid relative to the freeze-dried cell weight. The solvent was removed from the extract with water saturated with carbon dioxide at atmospheric pressure and recovered from the water upon de-carbonation of the mixture.
N,N-Dimethylcyclohexylamine Application
Dimethylcyclohexylamine (PC-8) is recommended for evaluation in a broad range of rigid foams. A major application is insulation foams, including spray, slabstock, board laminate and refrigeration formulations. NT CAT PC-8 is also used in rigid foam furniture frame and decorative parts manufacturing. It can be batched with the polyol or metered as a separate stream.
N,N-Dimethylcyclohexylamine Storage
Store is a cool, ventilated warehouse. Keep away from fire and heat sources. Keep the container sealed.
ADVANTAGES:
• Excellent stability characteristics
• Good gelling capability
APPLICATIONS: Dimethylcyclohexylamine is recommended for evaluation in a broad range of rigid foams. A major application is insulation foams, including spray, slabstock, board laminate and refrigeration formulations. Dimethylcyclohexylamine is also used in rigid foam furniture frame and decorative parts manufacturing. Dimethylcyclohexylamine can be used alone without any tin catalyst, or used together with other JD catalysts depending on process and specific requirements.
Consumer Uses:
This substance is used in the following products: polymers.
Release to the environment of this substance can occur from industrial use: formulation in materials and in the production of articles. Other release to the environment of this substance is likely to occur from: outdoor use, indoor use, outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).
TYPICAL PROPERTIES:
Physical Description: Dimethylcyclohexylamine is a colorless liquid with a musky ammonia odor. Less dense than water
Appearance: Colorless-to-Straw Liquid
Sales content: 99% min
Water content:0.25% max
Flash Point: 40°C
Specific Gravity at 25°C : 0.87
Water Solubility: Insoluble
Dimethylcyclohexylamine is used in polyurethane plastics and textiles and as a chemical intermediate. Colorless liquid with a musky ammonia odor. Less dense than water. Highly flammable. Water soluble. N,N-Dimethylcyclohexylamine neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides. This amine is used as a catalyst in the production of polyurethane foams. It is also used as an intermediate for rubber accelerators and dyes and in the treatment of textiles.
Uses:
Adhesive: General adhesives and binding agents for a variety of uses
Binding : Binding agents, used in paint, sand, etc
Building construction: Related to the building or construction process for buildings or boats (includes activities such as plumbing and electrical work, bricklaying, etc)
Brick: Bricks or related to bricklaying/masonry
Insulation: Insulating materials to protect from noise, cold, etc (such as used in homes or buildings), insulating materials related to electricity
Building material: Materials used in the building process, such as flooring, insulation, caulk, tile, wood, glass, etc.
Filler: Fillers for paints, textiles, plastics, etc
Catalyst: Catalyst, more information not known
Colorant: Term used for colorants, dyes, or pigments; includes colorants for drugs, textiles, personal care products (cosmetics, tatoo inks, hair dye), food colorants, and inks for printing;
Construction: General construction (as opposed to those things labeled building_construction); i.e.
Drug: Drug product, or related to the manufacturing of drugs; modified by veterinary, animal, or pet if indicated by source
Electrical, insulation: Insulating materials to protect from noise, cold, etc (such as used in homes or buildings), insulating materials related to electricity
Fluid property modülatör: Includes antifoaming agents, coagulating agents, dispersion agents, emulsifiers, flotation agents, foaming agents, viscosity adjustors, etc
Food contact: Includes food packaging, paper plates, cutlery, small appliances such as roasters, etc.; does not include facilities that manufacture food
Fuel: General fuels, fuel additives, motor/automotive fuels
Manufacturing, automotive: Generally related to automobiles or their manufacture
Manufacturing, building material, plastics: Plastic products, industry for plastics, manufacturing of plastics, plastic additives
Manufacturing, building material, wood: Wood used as a building material, wood preservatives
Manufacturing, chemical: General term used only when the only information known from the source is 'chemical,' typically related to manufacturing of chemicals, or laboratory chemicals
Manufacturing, electrical: Related to electrical work (such as wiring of a building), electric current insulation materials, or other electrical components
Manufacturing, export: Related to manufacturing for export
Manufacturing, furniture: Furniture, or the manufacturing of furniture (can include chairs and tables, and more general furniture such as mattresses, patio furniture, etc.)
Manufacturing, machines: Manufacturing of or related to machinery, for production of cement or food, air/spacescraft machinery, electrical machinery, etc
Manufacturing, metals Related to metals - manufacturing of metals, casting of metals, production of metals, surface treatment of metals, etc
Manufacturing, oil: Crude oil, crude petroleum, refined oil products, fuel oils, drilling oils
Manufacturing, paint: Various types of paint for various uses
Manufacturing, plastics Plastic products, industry for plastics, manufacturing of plastics, plastic additives
Raw material: Raw materials used in a variety of products and industries (e.g. in cosmetics, chemical manufacturing, production of metals, etc)
Manufacturing, rubber Rubber products (e.g. tires) and their manufacture
Paint: Various types of paint for various uses
Paint, automotive care Relatived to the maintenance and repair of automobiles, products for cleaning and caring for automobiles (auto shampoo, polish/wax, undercarriage treatment, brake grease)
Pesticide, inert ingredient: Inert ingredients in a pesticide
Photographic: Related to photography, film, photographic equipment, photographic laboraties, photochemicals, and developing of photographs
Plastics : Plastic products, industry for plastics, manufacturing of plastics, plastic additives
Printing : Related to the process of printing (newspapers, books media, etc), printing inks, toners, etc
Printing, ink: Inks used for printing or writing
Process_regulator: Accelerators, activators, oxidation agents, reducing agents, etc
Raw material, plastics: Plastic products, industry for plastics, manufacturing of plastics, plastic additives
Rubber: Rubber products (e.g. tires) and their manufacture
N,N-dimethylcyclohexylamine is a low-viscosity, moderately active amine catalyst that can be used in a wide range of rigid foams. One of the main applications is the formulation of insulating foams, spray coatings, plates, plywood, on-site pouring and refrigeration. N,N-dimethylcyclohexylamine is also suitable for the manufacture of rigid foam furniture frames and decorative parts.
Dimethylcyclohexylamine is especially suitable for the preparation of two-component systems. It can be dissolved in many rigid foam polyols and additives. In the combination, the performance is stable, no need to add organic tin, moderate activity, large adjustability, and long-term Store. Adding appropriate amount of LCA-1 and LCA-3 to the large-capacity refrigerator combination material can improve the foam flow performance. Generally, the amount of hard foam is about 3% of polyether, and auxiliary catalyst can also be added according to product requirements. This product has ammonia and bitter taste, has a stimulating effect on the skin, and has certain toxicity. It is necessary to wear protective equipment during production.
Dimethylcyclohexylamine is a low-viscosity, moderately active amine catalyst used for refrigerator hard foams, plates, spray coating, and in-situ polyurethane hard foam infusion. DMCHA catalyst has a catalyst effect on both gel and foam. Dimethylcyclohexylamine provides a more balanced catalytic performance for the foaming reaction and gel reaction of hard foam. It has moderate catalytic activity for the reaction of water and isocyanate. It is a strong initial catalyst for foam reaction. Dimethylcyclohexylamine can be used as a separate catalyst, but it is generally shared with other catalysts. According to the difference in reaction speed and foam properties, the amount of Dimethylcyclohexylamine per 100 parts of polyether polyol is between 0.5-3.5 parts. In addition to being used for hard foams, dimethylcyclohexylamine Dimethylcyclohexylamine can be used as an auxiliary catalyst for molding soft foams and semi-rigid foams.
In addition to being mainly used as a catalyst for rigid polyurethane foams, N-dimethylcyclohexylamine is also widely used in other aspects: it is also used as a fuel oil stabilizer to prevent the formation of oil residues; it is also a petroleum fraction at 150-480°C Stabilizing additives; also used as raw materials for medicines and pesticides, as bactericides, disinfectants, leveling agents and antistatic agents, etc.
Storage and transportation: Should be sealed and stored in a dry, cool and ventilated warehouse.
Health hazards Invasion route: inhalation, ingestion, percutaneous absorption. Health hazards: This product is strongly irritating to mucous membranes, upper respiratory tract, eyes and skin. After inhalation, it can be fatal due to spasm, inflammation, edema, chemical pneumonia or pulmonary edema of the larynx and bronchus. Burning sensation, cough, wheezing, laryngitis, shortness of breath, headache, nausea and vomiting after exposure.
Hazardous characteristics:
It is flammable in case of fire and high heat. It can react with oxidants. In case of high heat, the internal pressure of the container increases and there is a risk of cracking and explosion. Combustion (decomposition) products: carbon monoxide, carbon dioxide, nitrogen oxide.
Dimethylcyclohexylamine is recommended for evaluation in a broad range of rigid foams. A major application is insulation foams, including spray, slabstock, board laminate and refrigeration formulations. Dimethylcyclohexylamine is also used in rigid foam furniture frame and decorative parts manufacturing. It can be batched with the polyol or metered as a separate stream.
Dimethylcyclohexylamine can be stored in a dry and cool area under appropriate ventilation conditions. Each container should be closed tightly to avoid contamination with moisture or other negative influences that could change the products’ performance in the end use. The optimum storage temperature is between 10 °C and 30 °C. Lower and higher storage temperatures are not preferable and should be avoided.
A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause pulmonary edema; Can be absorbed through skin; [ICSC] Irritating or corrosive to animal skin; Irritating to rabbit eyes; Not sensitizing to guinea pig skin using skin painting test; [IUCLID] Causes muscle contraction or spasticity in lethal-dose studies of mice (inhalation and oral routes); [RTECS] Causes burns; Toxic if inhaled.
The main use of N,N-dimethylcyclohexylamine is as a catalyst for rigid polyurethane foams. It is a low viscosity, medium active amine catalyst used in refrigerators, sheets, sprays, and in-situ filled polyurethane rigid foams. The catalyst catalyzes both gelation and foaming, provides a relatively balanced catalytic performance for the foaming reaction and gel reaction of the rigid foam, and has a stronger catalyst for the reaction of water and isocyanate (foaming reaction), and The reaction of the polyol plume isocyanate is also moderately catalytic and is a strong initial catalyst for the foaming reaction. In addition to being used for hard foams, it can also be used to mold auxiliary foaming agents such as soft foams and semi-rigid foams. It has stable performance in the composition, great adjustability and long-term storage.
Dimethylcyclohexylamine is a strongly basic, general purpose catalyst recommended for a broad range of rigid and semirigid urethane foams, including spray, slabstock, laminations and refrigeration insulation panels. Dimethylcyclohexylamine, which is readily soluble in most polyols and organic solvents but essentially insoluble in water, shows excellent stability in B-compounds and can be batched with polyols or metered separately.
n,n Dimethylcyclohexylamine is a tertiary amine consisting of cyclohexane having a dimethylamino substituent.n,n Dimethylcyclohexylamine is a colorless liquid with a musky ammonia odor. Less dense than water.n,n Dimethylcyclohexylamine is a colorless liquid with a musky ammonia odor. Less dense than water.n,n Dimethylcyclohexylamine WAS BUBBLED WITH 0.2-0.3 L/MIN N CONTAINING 2020 PPM HYDROGEN SULFIDE FOR 15 MIN; THE HYDROGEN SULFIDE REMOVAL WAS 100%.n,n Dimethylcyclohexylamine CAN BE COLLECTED BY ASPIRATION THROUGH 0.01N HCL, EXTRACTED WITH CHCL3, AND DETERMINED BY COLORIMETRY USING A BLUE FILTER. THE METHOD WILL DETECT 0.5 MUG IN 3 ML 0.01N HCL.n,n Dimethylcyclohexylamine neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.n,n Dimethylcyclohexylamine (DMEA), sometimes referred to as dimethylethylamine, is an organic compound with formula C4H11N. It is an industrial chemical that is mainly used in foundries as a catalyst for sand core production.
Dimethylethylamine is a malodorous, volatile liquid at room temperature that is excreted at greater concentrations with larger dietary intake of trimethylamine. It has recently been identified as an agonist of human trace amine-associated receptor 5.n,n Dimethylcyclohexylamine is used in polyurethane plastics and textiles and as a chemical intermediate.n,n Dimethylcyclohexylamine is manufactured either by the reaction of methyl chloride or formaldehyde and hydrogen with cyclohexylamine (HSDB 1989).n,n Dimethylcyclohexylamine neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.Industrial hygiene studies in polyurethane manufacturing plants have identified levels of 0.007-0.81 p.p.m. n,n Dimethylcyclohexylamine in air; however, these levels were not regarded as hazardous (Reisdorf and Haggerty 1982). There are no current exposure standards for n,n Dimethylcyclohexylamine and no documentation of human toxicological effects.n,n Dimethylcyclohexylamine neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.n,n Dimethylcyclohexylamine catalyst is a strongly basic, clear, colorless-to-straw liquid tertiary amine. The material has a characteristic amine odor. n,n Dimethylcyclohexylamine catalyst will darken on standing, with no effect on reactivity. It is readily soluble in most polyols and organic solvents but is essentially insoluble in water. n,n Dimethylcyclohexylamine catalyst is recommended for evaluation in a broad range of rigid foams. A major application is insulation foams, including spray, slabstock, board laminate and refrigeration formulations. n,n Dimethylcyclohexylamine catalyst is also used in rigid foam furniture frame and decorative parts manufacturing. It can be used alone without any tin catalyst, or used together with other JD catalysts depending on process and specific requirements.Binary mixtures of water and organic solvents are described as the aqueous solutions of organic solvents, which are usually spatially heterogeneous on the scale of a few molecular sizes but homogeneous on longer length scales, that is, microheterogeneity. For the water–organic solvent binary mixtures with microheterogeneity, most organic solvents are miscible with water at any ratio. Interestingly, some slightly water-miscible organic solvents can also be used to prepare binary mixtures with microheterogeneity. In this study, n,n Dimethylcyclohexylamine (DMCHA) was used to prepare binary mixtures with microheterogeneity and CO2 switchability. With the help of conductivity, Fourier–transform infrared spectroscopy, ultraviolet–visible spectroscopy, and dynamic light scattering measurements, we found that water molecules are hydrogen-bonded together to form clusters over the water content range of 9 to 27 wt %, exhibiting microheterogeneity in the binary mixture. The size of the water clusters increases slightly with increasing water content. What is more, the n,n Dimethylcyclohexylamine–water mixtures can be reversibly split into two phases by alternate bubbling of CO2 and N2, exhibiting excellent CO2 switchability. The binary mixtures can be used as reaction media for the synthesis of CaCO3 nanoparticles. Binary mixtures with microheterogeneity can also be formed under high salinity or high temperature conditions or be prepared using other slightly water-miscible organic solvents, opening up more interesting possibilities for binary mixtures with microheterogeneity.UV–vis absorption spectra of methylene blue and Nile red; dynamic IFT of n,n Dimethylcyclohexylamine–water at 17 °C; maximum XW value for binary mixtures of water and alcohols with different carbon numbers; maximum XW value for n,n Dimethylcyclohexylamine–water mixtures at different temperatures; phase behavior of the n,n Dimethylcyclohexylamine–water mixture with XW of 60 wt %; phase behavior of the n,n Dimethylcyclohexylamine–water mixture with XW of 20 wt %; species distribution of n,n Dimethylcyclohexylamine; size distribution of water clusters in the original n,n Dimethylcyclohexylamine–water mixture and in the mixture treated with CO2/N2; and illustration of recovering and recycling n,n Dimethylcyclohexylamine in the preparation process of CaCO3 nanoparticles.
n,n Dimethylcyclohexylamine has been used:
• as switchable hydrophilicity solvent (SHS) for the extraction of lipids from freeze-dried samples of Botryococcus braunii microalgae for biofuel production
• as catalyst in three-component organocatalyzed Strecker reaction on water
