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CG5 Sigma-Aldrich

Chorionic gonadotropin human

lyophilized powder, vial of ~5,000 IU

Synonym: Choriogonin, HCG



Related Categories Cell Biology, Cell Signaling and Neuroscience, Chorionic Gonadotropin, Cytokines, Growth Factors and Hormones, Hormones,
biological source   human urine
sterility   sterile-filtered
form   lyophilized powder
mol wt   37.9 kDa
contains   mannitol
packaging   vial of ~5,000 IU
drug control   Home Office Schedule 4.2
impurities   HBsAg, HCV and HIV-1/HIV-2, tested negative
solubility   water: 10 mL/vial, clear to slightly hazy, colorless
shipped in   ambient
storage temp.   −20°C
Gene Information   human ... CGA(1081)


General description

Chorionic gonadotropin human (CGA or hCG) is a heterodimer and belongs to the cystine knot growth factor superfamily. It exists as six variants namely hCGn, hCGβ, hCGβn, hCGβcf and hCGα including hCG. CGA is mapped to human chromosome 6q14.3. hCG comprises of α and β chain.

Glycoprotein hormone consisting of a 92-amino acid α-chain which is identical to that of LH, FSH, and TSH; and a distinct 149-amino acid β-chain. Produced by chorionic tissue and responsible for maintaining the corpus luteum during early pregnancy. Also produced by trophoblast cell neoplasms, which are marked by elevated free hCG β-chains and hyperglycosylated hCG.


Chorionic gonadotropin human has been used:
• to induce oocyte maturation in cultured follicles
• along with pregnant mare serum gonadotropin (PMSG) to induce superovulation in mice
•  as medium component for fetal testes culture to aid steroidogenic responsiveness

Biochem/physiol Actions

Elevated levels of hCG is observed in trophoblastic cancer. hCG levels are indicators of pregnancy and β subunit is majorly present in urine samples. hCG isoform detection is useful in the diagnosis and management of trophoblastic related diseases including carcinomas.


When reconstituted with water to a concentration of 1,000 IU/mL, the vial will also contain 0.1 M sodium phosphate buffer (pH approx. 7.2) and 100 mg/mL of mannitol.

Analysis Note

The calculated value is based on the USP method for human Chorionic Gonadotrophin, to meet 5,000 IU per vial, with a tolerance of not less than 80.0% and not more than 125.0% of the potency stated.

Safety & Documentation

Safety Information

GHS08  GHS08
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles
Peer-Reviewed Papers


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