Abarelix acetate

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MedKoo CAT#: 574014

CAS#: 785804-17-3 (acetate)

Description: Abarelix acetate is a synthetic third generation gonadotropin-releasing hormone receptor (GnRHR) antagonist. It increases histamine release from rat peritoneal mast cells in vitro and from a human skin model ex vivo. In vivo, abarelix decreases plasma luteinizing hormone (LH) levels six hours post-treatment in castrated rats, with levels returning to baseline within 24 hours.3 Abarelix (2 mg/kg) also transiently decreases plasma testosterone levels in intact rats, with levels returning to baseline within seven days post-treatment. Formulations containing abarelix have previously been used in the treatment of advanced prostate cancer.

Chemical Structure

Abarelix acetate
CAS# 785804-17-3 (acetate)

Theoretical Analysis

MedKoo Cat#: 574014
Name: Abarelix acetate
CAS#: 785804-17-3 (acetate)
Chemical Formula: C74H99ClN14O16
Exact Mass: 1474.7052
Molecular Weight: 1476.14
Elemental Analysis: C, 60.21; H, 6.76; Cl, 2.40; N, 13.28; O, 17.34

Price and Availability

Size Price Availability Quantity
1.0mg USD 280.0 2 Weeks
5.0mg USD 590.0 2 Weeks
10.0mg USD 945.0 2 Weeks
25.0mg USD 1800.0 2 Weeks
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Related CAS #: 785804-17-3 (acetate)   183552-38-7 (free base)    

Synonym: Abarelix acetate

IUPAC/Chemical Name: N-acetyl-3-(2-naphthalenyl)-D-alanyl-4-chloro-D-phenylalanyl-3-(3-pyridinyl)-D-alanyl-L-seryl-N-methyl-L-tyrosyl-D-asparaginyl-L-leucyl-N6-(1-methylethyl)-L-lysyl-L-prolyl-D-alaninamide, acetate salt


InChi Code: InChI=1S/C72H95ClN14O14.C2H4O2/c1-41(2)32-54(64(93)80-53(17-10-11-30-77-42(3)4)72(101)87-31-13-18-60(87)69(98)78-43(5)63(75)92)81-68(97)58(38-62(74)91)84-70(99)61(37-46-22-27-52(90)28-23-46)86(7)71(100)59(40-88)85-67(96)57(36-48-14-12-29-76-39-48)83-66(95)56(34-45-20-25-51(73)26-21-45)82-65(94)55(79-44(6)89)35-47-19-24-49-15-8-9-16-50(49)33-47;1-2(3)4/h8-9,12,14-16,19-29,33,39,41-43,53-61,77,88,90H,10-11,13,17-18,30-32,34-38,40H2,1-7H3,(H2,74,91)(H2,75,92)(H,78,98)(H,79,89)(H,80,93)(H,81,97)(H,82,94)(H,83,95)(H,84,99)(H,85,96);1H3,(H,3,4)/t43-,53+,54+,55-,56-,57-,58-,59+,60+,61+;/m1./s1

SMILES Code: CC(N[C@H](CC1=CC(C=CC=C2)=C2C=C1)C(N[C@H](CC3=CC=C(Cl)C=C3)C(N[C@H](CC4=CC=CN=C4)C(N[C@@H](CO)C(N(C)[C@@H](CC5=CC=C(O)C=C5)C(N[C@H](CC(N)=O)C(N[C@@H](CC(C)C)C(N[C@@H](CCCCNC(C)C)C(N6CCC[C@H]6C(N[C@H](C)C(N)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O)=O.OC(C)=O

Appearance: A crystalline solid

Purity: >95% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >3 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 1476.14 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1. Tan, O., and Bukulmez, O. Biochemistry, molecular biology and cell biology of gonadotropin-releasing hormone antagonists. Curr. Opin. Obstet. Gynecol. 23(4), 238-244 (2011).

2. Jiang, G., Stalewski, J., Galyean, R., et al. GnRH antagonists: A new generation of long acting analogues incorporating p-ureido-phenylalanines at positions 5 and 6. J. Med. Chem. 44(3), 453-467 (2001).

3. Broqua, P., Riviere, P.J.-M., Conn, P.M., et al. Pharmacological profile of a new, potent, and long-acting gonadotropin-releasing hormone antagonist: Degarelix. J. Pharmacol. Exp. Ther. 301(1), 95-102 (2002).

4. Koechling, W., Hjortkjaer, R., and Tankó, L.B. Degarelix, a novel GnRH antagonist, causes minimal histamine release compared with cetrorelix, abarelix and ganirelix in an ex vivo model of human skin samples. Br. J. Clin. Pharmacol. 70(4), 580-587 (2010).

Additional Information

λmax: 226 nm