Osimertinib free base

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MedKoo CAT#: 206042

CAS#: 1421373-65-0 (free base)

Description: Osimertinib, also known as AZD-9291 and Mereletinib, is a third-generation EGFR inhibitor, showed promise in preclinical studies and provides hope for patients with advanced lung cancers that have become resistant to existing EGFR inhibitors. AZD9291 is highly active in preclinical models and is well tolerated in animal models. It inhibits both activating and resistant EGFR mutations while sparing the normal form of EGFR that is present in normal skin and gut cells, thereby reducing the side effects encountered with currently available medicines. Osimertinib was approved in Nov. 2015 by FDA.

Chemical Structure

Osimertinib free base
CAS# 1421373-65-0 (free base)

Theoretical Analysis

MedKoo Cat#: 206042
Name: Osimertinib free base
CAS#: 1421373-65-0 (free base)
Chemical Formula: C28H33N7O2
Exact Mass: 499.26957
Molecular Weight: 499.61
Elemental Analysis: C, 67.31; H, 6.66; N, 19.62; O, 6.40

Price and Availability

Size Price Availability Quantity
1.0g USD 150.0 Ready to ship
2.0g USD 250.0 Ready to ship
5.0g USD 550.0 Ready to ship
10.0g USD 950.0 Ready to ship
20.0g USD 1450.0 Ready to ship
50.0g USD 2650.0 Ready to ship
100.0g USD 3650.0 Ready to ship
500.0g USD 8650.0 2 Weeks
1.0kg USD 12950.0 2 Weeks
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Related CAS #: 1421373-65-0 (free base)   1421373-66-1 (mesylate)    

Synonym: AZD9291; AZD 9291; AZD-9291; AZD-9291 freebase; Mereletinib; Osimertinib free base; trade name Tagrisso.

IUPAC/Chemical Name: N-(2-((2-(dimethylamino)ethyl)(methyl)amino)-4-methoxy-5-((4-(1-methyl-1H-indol-3-yl)pyrimidin-2-yl)amino)phenyl)acrylamide


InChi Code: InChI=1S/C28H33N7O2/c1-7-27(36)30-22-16-23(26(37-6)17-25(22)34(4)15-14-33(2)3)32-28-29-13-12-21(31-28)20-18-35(5)24-11-9-8-10-19(20)24/h7-13,16-18H,1,14-15H2,2-6H3,(H,30,36)(H,29,31,32)


Appearance: Brown to yellow solid powder

Purity: >98% (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, not in water

Shelf Life: >2 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

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
DMSO 100.0 200.16

Preparing Stock Solutions

The following data is based on the product molecular weight 499.61 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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Additional Information

Related CAS#
CAS#1421373-65-0 (Osimertinib free base);
CAS#1421373-66-1 (Osimertinib mesylate salt)