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Clofibrate structure
Chemical Name:
Molecular Formula:
Formula Weight:
MOL File:

Clofibrate Properties

Boiling point:
154 °C
1.14 g/mL at 25 °C(lit.)
refractive index 
n20/D 1.503
Flash point:
113 °C
storage temp. 
Soluble to 100 mM in DMSO.
clear, colorless
CAS DataBase Reference
637-07-0(CAS DataBase Reference)
NIST Chemistry Reference
EPA Substance Registry System
Propanoic acid, 2-(4-chlorophenoxy)-2-methyl-, ethyl ester(637-07-0)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xn,N
Risk Statements  22-37/38-41-51/53-40
Safety Statements  26-36/37/39-61-45-36/37
RIDADR  UN 3082 9/PG 3
WGK Germany  3
RTECS  UE9480000
HazardClass  9
HS Code  29189900
Hazardous Substances Data 637-07-0(Hazardous Substances Data)
Toxicity LD50 in mice, rats (g/kg): 1.28, 1.65 orally (Metz)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H401 Toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 2 P273, P501
H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Clofibrate price More Price(17)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 41326 Clofibrate analytical standard 637-07-0 100mg $63.8 2018-11-13 Buy
Sigma-Aldrich 1139000 Clofibrate United States Pharmacopeia (USP) Reference Standard 637-07-0 1g $352.8 2018-11-13 Buy
TCI Chemical C0941 Clofibrate >98.0%(GC) 637-07-0 25g $57 2018-11-22 Buy
TCI Chemical C0941 Clofibrate >98.0%(GC) 637-07-0 500g $520 2018-11-22 Buy
Alfa Aesar J60342 Clofibrate, 95+% 637-07-0 1g $17.5 2018-11-13 Buy

Clofibrate Chemical Properties,Uses,Production

Chemical Properties

Clear Colorless Oil




inhibits cholesterol biosynthesis




ChEBI: The ethyl ester of clofibric acid.

brand name

Atromid (Wyeth);Aatroayerst;Aitiflus;Angiocapsul;Arterioflexion;Artriosan;Asa/cpib;Aterioplexin;Ateroayrest;Ateroclar;Aterofront;Ateronlen;Aterosol;Atevil;Atheroayerst;Atrofort;Atrolan;Atromid-s;Atrom-s;Ay 61;Biocleran;Clareden;Cloberab;Clobrate;Clobren-5 f;Clofenit;Clofibral;Clofibrate ayerst;Clofibrate compose;Clofibrato ayerst;Clofibrato procaps;Clofibrem;Clofimide;Clofin-icn;Clofipront 5000;Clofirem;Clofirin;Clofi-t;Clopin;Col 180;Contra-lipide;Corafen;Cr/085;Dabical;Dilectus;Doctus;Duplinal;Duraclofibrate;Ellemger;Eramid;Fibramid;Fibrolynt;Geri-70;Geromid;Healthstyle;Ici 28257nt;Ipolipid;Kontalipide;Levatram;Liapten;Liparil;Lipaten;Lipavlon 500;Lipicidon;Lipidicon;Liporan;Liptrinal;Lostat;Neoatromid;Nibratal;Nibratol;Nnormet;Nobret;Norinolipol;Normet richter;Nosterolin;Novofibrate;Omelip;Provasa;Recade;Regelan n 500;Sclerovasal;Serolipid;Sinteroid;Sklerocip;Sklerolip;Sklerovasal;Supraoxid;Tepincal;Tepingal;Vimedel;Vocaline.

World Health Organization (WHO)

Clofibrate, an antihyperlipidaemic agent, was introduced in 1967 and was subsequently extensively studied in the primary and secondary prevention of ischaemic heart disease. Following reports, published in 1978, of increased mortality among patients receiving clofibrate in a WHO-sponsored cooperative trial concerned with the primary prevention of ischaemic heart disease, the drug was withdrawn in some countries and its approved indications were severely restricted in many others. These restrictions have become the norm for more recently developed analogues of clofibrate. (Reference: (WHODI) WHO Drug Information, 2, 6, 1979)

General Description

Clofibrate, ethyl 2-(p-chlorophenoxy)-2-methylpropionate (Atromid-S), is a stable, colorless topale yellow liquid with a faint odor and a characteristictaste. It is soluble in organic solvents but insoluble in water.
Clofibrate is prepared by a Williamson synthesis, condensingp-chlorophenol with ethyl -bromoisobutyrate, or bythe interaction of a mixture of acetone, p-chlorophenol, andchloroform in the presence of excess potassium hydroxide.The acid obtained by either of these methods is esterified togive clofibrate. Both acid and ester are active; the latter, however,is preferred for medicinal use. Clofibrate is hydrolyzedrapidly to 2-p-chlorophenoxy-2-methylpropionic acid by esterasesin vivo and, bound to serum albumin, circulates inblood. The acid has been investigated as a hypolipidemicagent. It is absorbed more slowly and to a smaller extent thanis the ester. The aluminum salt of the acid gives even lowerblood levels than p-chlorophenoxy-2-methylpropionic acid.


Questionable carcinogen; toxic; causes nausea, vomiting, diarrhea, weakness, stiffness, cramps, and muscle tenderness.

Biological Activity

PPAR agonist (EC 50 values are 50, 500 and > 100 μ M at PPAR α , PPAR γ and PPAR δ respectively). Antihyperlipoproteinemic.

Mechanism of action

The three structurally related fibrates available in the United States are gemfibrozil (Lopid), fenofibrate (Tricor) and clofibrate (Atromid-S).They share common uses and toxicities. The fibrates typically lower VLDL triglyceride by 40% or more and elevate plasma HDL cholesterol by 10 to 15%. The reduction of plasma triglycerides in humans appears due to increased lipoprotein lipase (LPL) activity. The fibrates activate a nuclear receptor (transcription factor) termed peroxisomal proliferation activated receptor (PPAR) that is a member of the steroid hormone receptor superfamily. PPAR increases transcription of the LPL gene and decreases transcription of the apolipoprotein CIII gene (apo CIII). Since LPL is responsible for catabolism of VLDL triglyceride and apo CIII is an inhibitor of LPL activity, the combined consequences of these changes are increased LPL activity and enhanced removal of triglyceride from the circulation.
The elevation of HDL levels by fibrates may be due to two drug actions: induced synthesis of apo-A1, the principal apoprotein of HDL, and increased assembly of new HDL particles in the circulation. Surface components of VLDL contribute to formation of HDL, as the VLDL particles are reduced in size through the action of LPL.The increased rate of catabolism of VLDL caused by the fibrates would provide more components for assembly of HDL particles.

Clinical Use

Clofibrate is the drug of choice in the treatment of typeIII hyperlipoproteinemias and may also be useful, to a lesserextent, in types IIb and IV hyperlipoproteinemias. The drugis not effective in types I and IIa.
Clofibrate can lower plasma concentrations of both triglyceridesand cholesterol, but it has a more consistent clinicaleffect on triglycerides. It also affects lipoprotein plasmalevels by enhancing removal of triglycerides from the circulationand causes reduction of VLDL by stimulatinglipoprotein lipase to increase the catabolism of this lipoproteinto LDL. Clofibrate lowers triglyceride levels in theserum much more than cholesterol levels and decreases levelsof FFAs and phospholipids. The lowering of cholesterollevels may result from more than one mechanism. Clofibrateinhibits the incorporation of acetate into the synthesis ofcholesterol, between the acetate and mevalonate step, by inhibitingsn-glyceryl-3-phosphate acyltransferase. Clofibratealso regulates cholesterol synthesis in the liver by inhibitingmicrosomal reduction of 3-hydroxy-3-methylglutaryl-CoA(HMG-CoA), catalyzed by HMG-CoA reductase. Clofibratemay lower plasma lipids by means other than impairment ofcholesterol biosynthesis, such as increasing excretionthrough the biliary tract.

Side effects

The fibrates are generally well tolerated, with GI distress being the most likely complaint. Other adverse effects include myositis and erectile dysfunction, particularly with clofibrate. There is ongoing concern about the fibrates increasing the risk of gallstones, although the extent of risk is unclear. Because clofibrate was associated with increased mortality in early clinical trials, it should be considered as a second-line drug.

Drug interactions

The fibrates potentiate the actions of the coumarin anticoagulants, such as warfarin, so care should be taken to reduce the dose of simultaneously administered anticoagulants, and plasma prothrombin should be frequently measured until the level stabilizes. As mentioned earlier, great care should be given to combining a statin with a fibrate, since this combination may increase the risk of myositis and perhaps rhabdomyolysis.

Clofibrate Preparation Products And Raw materials

Raw materials

Preparation Products

Clofibrate Suppliers

Global( 161)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Shenzhen Sendi Biotechnology Co.Ltd.
0755-23311925 18102838259
0755-23311925 CHINA 3203 55
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 21840 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20676 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32452 55
Nanjing ChemLin Chemical Industry Co., Ltd.
025-83697070; CHINA 3015 60
career henan chemical co
+86-371-86658258 CHINA 25796 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 23957 58
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) China 40275 62
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、802、803、804 Mobile:18930552037
86-21-50328109 China 15882 69

View Lastest Price from Clofibrate manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-08-16 Clofibrate
US $11.00 / KG 1KG 99% 1000KG career henan chemical co
2018-08-15 Clofibrate
US $2.00 / KG 1KG 98% 1ton career henan chemical co

Clofibrate Spectrum

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