Chorionic Gonadotropin, Human (hCG)

hCG Dissolves easily and clearly in a sodium chloride solution. Human chorionic gonadotropin (hCG) is a peptide hormone produced in pregnancy, that is made by the embryo soon after conception and later by the trophoblast (part of the placenta).

Levels of hCG may be measured in the blood or urine. Most commonly, this is done as a pregnancy test, intended to indicate the presence or absence of an implanted embryo. Testing for hCG may also be done when diagnosing or monitoring germ cell tumors and gestational trophoblastic disease.

Human chorionic gonadotropin may have additional functions. For instance, hCG is thought to affect the immune tolerance of the pregnancy, and early testing is generally is based on detection or measurement.

Source:
Human Chorionic Gonadotropin (hCG), from pregnancy urine.

Solubility
Clear, colorless to faint yellow (10mg/ml H20)

Activity:
> 6000IU/mg (Bio-Assay)

pH:
5.5-8.0 (1mg/mL H2O at 25°C)

Storage and Stability:
Lyophilized and reconstituted products are stable for 6 months after receipt at -20°C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.