CSN2
Casein
CAS: 9000-71-9
Molecular Formula: C81H125N22O39P
CSN2 - Names and Identifiers
| Name | Casein |
| Synonyms | CSN2 RHODIUM STAND Bile Salte No.3 ANTI-CSN2 (N-TERM) antibody produced in rabbit |
| CAS | 9000-71-9 |
| EINECS | 232-555-1 |
CSN2 - Physico-chemical Properties
| Molecular Formula | C81H125N22O39P |
| Molar Mass | 2061.956961 |
| Melting Point | 280°C (dec.)(lit.) |
| Water Solubility | SLIGHTLY SOLUBLE |
| Solubility | H2O: insoluble, forms a cloudy suspension |
| Appearance | White to bright yellow solid |
| Color | yellow to tan |
| Odor | Odorless |
| Merck | 14,1883 |
| Storage Condition | -20°C |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents. |
| Sensitive | Hygroscopic |
| Physical and Chemical Properties | Casein is a phosphorus-containing protein in the milk of animals. Structural formula is NH2RCOOH, odorless, tasteless white to yellow powder, relative density 1.25-1.31. Almost insoluble in water, alcohol and ether. Dissolved in dilute alkali solution, alkaline carbonate solution and concentrated acid, precipitation in weak acid. Hygroscopic, stable when dry, wet when the rapid hardening. |
| Use | Used as a Biochemical reagent |
CSN2 - Risk and Safety
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | FI3519500 |
| FLUKA BRAND F CODES | 10-21 |
| TSCA | Yes |
| HS Code | 35011000 |
CSN2 - Upstream Downstream Industry
| Raw Materials | Phenol epsilon-Caprolactam Sodium sulfite DIETHYLENE GLYCOL |
| Downstream Products | Casein Sodium Casein |
CSN2 - Nature
Open Data Verified Data
is a yellowish particulate solid with a powdered milk odor. Soluble in dilute alkali and concentrated acid. The main component of protein, molecular weight 75000~375000. Generally, the water content is 8 ~ 10%, and the water content is gradually reduced when kept at 93~135 ℃ for a long time, and the color is darkened by decomposition and coking when heated at 204~232 ℃. Casein and formaldehyde, into a hard material, known as casein plastic, the resistance to water is very strong. Casein can absorb water, such as impurities more absorbent. When immersed in water, it expands rapidly, but the particles do not bind.
Last Update：2024-01-02 23:10:35
CSN2 - Preparation Method
Open Data Verified Data
generally from fresh milk by degreasing, acid (lactic acid, acetic acid, hydrochloric acid or sulfuric acid can be) coagulation, drying and made.
Last Update：2022-01-01 11:12:19
CSN2 - Application
Open Data Verified Data
It is mainly used as a binder, a brightening agent, a dispersion stabilizer and a pharmaceutical preparation.
Last Update：2025-08-19 16:24:40
CSN2 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | casein is a major protein found in the milk of mammals, including cows, sheep and humans. Milk protein, mainly to Casein (Casein)-based, human milk to albumin-based. Casein is a large, hard, dense, extremely difficult to digest and break down curds. Casein is the most abundant protein in milk, which is mainly used as food raw materials or microbial culture medium at present. Casein phosphopeptides prepared by protein enzymatic hydrolysis technology can prevent mineral loss, especially its promoting constant elements (Ca, Mg) and trace elements (Fe, Zn, Cu, Cr, Ni, Co, Mn, Se) the functional properties of efficient absorption make it a "mineral carrier", which can be combined with metal ions, especially calcium ions to form soluble complexes. |
| trait | casein is a non-crystalline, non-hygroscopic substance, which can dissolve 0.8-1.2% in water at room temperature, slightly soluble in 25 ° C water and organic solvents, soluble in dilute alkali and concentrated acid, can absorb water, when immersed in water, the rapid expansion, but the mosquito does not combine. |
| properties | casein is a phosphorus-containing protein in the milk of animals. Structural formula is NH2RCOOH, odorless, tasteless white to yellow powder, relative density 1.25-1.31. Almost insoluble in water, alcohol and ether. Dissolved in dilute alkali solution, alkaline carbonate solution and concentrated acid, precipitation in weak acid. Hygroscopic, stable when dry, wet when the rapid hardening. |
| Use | thickener; Emulsifier; Stabilizer; Nutrition enhancer; Binder; Filler; Carrier. Limited: Ice cream dosage 0.3%-0.7%; Meat products and meat products are 1%-3%; Reinforced bread, biscuit protein 5%; Mayonnaise 3%. thickeners; Emulsifiers; Stabilizers; Nutrition enhancers (protein strengthening); Binders; Fillers; Carriers. Especially suitable for cheese, ice cream, the dosage of 0.3% ~ 0.7%, meat products (ham, sausage) 1%~ 3% and aquatic meat products. Fortified bread, biscuits 5% protein; Mayonnaise 3%. acid casein is mainly used as a binder for coatings, wood, paper and cloth adhesives, food additives, etc. As the binder of the coating, it accounts for about half of the total consumption, has excellent water resistance, can be well dispersed in the pigment, and improves the uniformity of the coating. In addition, because of good fluidity, easy coating construction, crude rennet 2 protein is mainly used for the manufacture of plastic buttons. Casein buttons compared with other resin buttons, dyeing, processing, bright color are good, quality in the buttons in the middle of the top. Casein is mixed with hydrated lime, sodium fluoride and copper sulfate, and then mixed with kerosene to obtain casein glue, It is a glue used in the aviation industry and wood processing sector. Casein is also used in medicine and biochemical reagents. hygroscopic, used as Wood sizing, paper coating, diabetes food, biological materials, textile pulp, etc. used as Biochemical reagent |
| Application | acid casein is mainly used as a binder for coatings, adhesives for wood, paper and cloth, food additives, etc. As the binder of the coating, it accounts for about half of the total consumption, has excellent water resistance, can be well dispersed in the pigment, and improves the uniformity of the coating. In addition, because of good fluidity, easy coating construction, crude rennet protein is mainly used for the manufacture of plastic buttons. Casein buttons compared with other resin buttons, dyeing, processing, bright color are good, quality in the buttons in the middle of the top. Casein is mixed with hydrated lime, sodium fluoride and copper sulfate, and then mixed with kerosene to obtain casein adhesive, which is a kind of adhesive used in aviation industry and wood processing department. Casein is also used in medicine and biochemical reagents. Casein is the major protein in the milk of mammals including cows, sheep and humans. The protein of milk, mainly in order to cheese |
| content analysis | accurately weigh about 100g of sample pre-dried at 0.15 ℃ for 3H, according to the conventional Kjeldahl nitrogen determination method. Each milliliter of 0.1mol/L sulfuric acid corresponds to 1.401mg of nitrogen. |
| toxicity | ld50400-500mg/kg (sodium caseinate, rat, oral). Natural food, non-toxic. |
| production method | (1) fresh milk is skimmed with acid (lactic acid, acetic acid, hydrochloric acid or sulfuric acid), the pH was adjusted to 4.6 to cause the casein micelles to lose charge and to coagulate and precipitate. The casein obtained by this method is called acid casein, and the acid casein obtained by adding different kinds of acid is almost no difference. Acid casein is a white to pale yellow powder or granule with a slightly milk odor and sour taste. Only swelling in water, if the addition of ammonia, alkali and its salts, can be dissolved in water dispersion. Soluble in strong acids, diethanolamine, morpholine, urea, formamide, hot phenol and Turkey red oil. (2) the role of milk and crude rennet, the formation of coagulation precipitates, known as crude rennet casein, white granular, almost tasteless and odorless, heating and burning will produce a unique odor. Rennet casein has a higher ash content than acid casein. skim milk is coagulated and precipitated with food grade acid or chymosin or other precipitating agent, and then separated, washed and dried. |
Last Update：2024-04-09 21:11:58
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Raw Materials for CSN2
Downstream Products for CSN2