Quick Details:

Product Name: Aromasin
CAS: 107868-30-4
MF: C20H24O2
MW: 296.4
mp: 155.13°C
storage temp: Store at -20°C
appearance: white to light yellow crystal powder



Aromasin blocks the process of aromatisation. So it lowers the amount of oestrogen in the body. In early breast cancer, taking Aromasin can help to stop breast cancer coming back. In advanced breast cancer the cancer cells may grow more slowly or stop growing completely.

Aromasin is an aromatase inhibitor. This means it blocks the enzyme aromatase (found in the body’s muscle, skin, breast and fat), which is used to convert androgens (hormones produced by the adrenal glands) into estrogen. In the absence of estrogen, tumors dependent on this hormone for growth will shrink.



Description White Crystalline Powder White Powder
Identification Positive Positive
Assay(by HPLC) 98.0~102.0% 99.23%
Absorbance(E1cm) 465~495 482.5
Melting Point 191~195°C 193.5~195.0°C
Loss On Drying 0.5%max 0.19%
Specific Rotation +288°~ +298° +290.2°
Residue On Ignition 0.1%max 0.03%
Related Substances Total:1.5%max <1.3%
  Single:0.5%max <0.4%
Residue Solvents 0.2%max 0.10%
Heavy Metals 20PPm max <10PPm



It is used in the treatment of metastatic breast cancer and used as aid in the treatment of early breast cancer.

1. It is one of the most powerful estrogen suppressing compounds.

2. It is one of the best compounds to lower the aromatizing effect of steroids.

3. It is available for body builders taking anabolic steroids.

4. It acts by blocking the enzyme aromatase, subsequently blocking the production of estrogen.