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| CAS No.: | 9004-32-4 |
|---|---|
| Name: | Carboxymethyl cellulose |
| Molecular Structure: | |
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| Formula: | C2H4O3.xNa.xUnspecified |
| Molecular Weight: | 262.19000 |
| Synonyms: | Carboxymethylcellulose Sodium;Polyanionic Cellulose;Cellulose carboxymethyl ether sodium salt;Sodium carboxymethyl cellulose;CMC sodium salt; |
| EINECS: | 900-432-4 |
| Density: | 1,6 g/cm3 |
| Melting Point: | 274 °C (dec.) |
| Boiling Point: | 527.1°C at 760 mmHg |
| Flash Point: | 286.7°C |
| Solubility: | soluble |
| Appearance: | POWDER |
| Hazard Symbols: | R40:有限证据表明其致癌作用; |
| Risk Codes: | 40 |
| Safety: | 24/25 |
| PSA: | 158.35000 |
| LogP: | -4.62260 |
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The Carboxymethyl cellulose, with the CAS registry number 9004-32-4, is also known as cellulose gum or CMC. It is a kind of polymer, and for detail, it is a cellulose derivative with carboxymethyl groups (-CH2-COOH) bound to some of the hydroxyl groups of the glucopyranose monomers that make up the cellulose backbone.
Physical properties about Carboxymethyl cellulose are: (1)#H bond acceptors: 8; (2)#H bond donors: 6; (3)#Freely Rotating Bonds: 10; (4)mp: 274 °C (dec.); (5)density: 1,6 g/cm3
Preparation of Carboxymethyl cellulose: It can be prepared by the alkali-catalyzed reaction of cellulose with chloroacetic acid. Because of its polar (organic acid) carboxyl groups, it is soluble and chemically reactive.
Uses of Carboxymethyl cellulose: It is a kind of widely used polymer. It can be used in food science as a viscosity modifier or thickener, and to stabilize emulsions in various products. It is used in the oil drilling industry as an ingredient of drilling mud, where it acts as a viscosity modifier and water retention agent. It can also be used in ice packs to form a eutectic mixture resulting in a lower freezing point and therefore more cooling capacity than ice. What's more, insoluble microgranular carboxymethyl cellulose is used as a cation-exchange resin in ion-exchange chromatography for purification of proteins.When you are using this chemical, please be cautious about it: Avoid contact with skin and eyes.
You can still convert the following datas into molecular structure:
(1)InChI=1S/C6H12O6.C2H4O2.Na.H/c7-1-3(9)5(11)6(12)4(10)2-8;1-2(3)4;;/h1,3-6,8-12H,2H2;1H3,(H,3,4);; ;
(2)InChIKey=WCQWAJDGOJLSEQ-UHFFFAOYSA-N;
(3)SmilesO[C@@H]([C@@H](O)[C@@H](C=O)O)[C@@H](CO)O.C(C)(O)=O.[Na];
The toxicity data is as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| guinea pig | LD50 | oral | 16000mg/kg (16000mg/kg) | Food Research. Vol. 13, Pg. 29, 1948. | |
| mouse | LD50 | oral | > 27gm/kg (27000mg/kg) | Proceedings of the European Society of Toxicology. Vol. 17, Pg. 351, 1976. | |
| rabbit | LD50 | oral | > 27gm/kg (27000mg/kg) | Proceedings of the European Society of Toxicology. Vol. 17, Pg. 351, 1976. | |
| rabbit | LD50 | skin | > 2gm/kg (2000mg/kg) | Toxicology Letters. Vol. (Suppl), Pg. 243, 1992. | |
| rat | LC50 | inhalation | > 5800mg/m3/4H (5800mg/m3) | Toxicology Letters. Vol. (Suppl), Pg. 243, 1992. | |
| rat | LD50 | oral | 27000mg/kg (27000mg/kg) | Food Research. Vol. 13, Pg. 29, 1948. |
