WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 574585

CAS#: 221632-26-4

Description: OBAA is a potent inhibitor of phospholipase A2 that reduces bronchospasm in guinea pigs in vivo.

Chemical Structure

CAS# 221632-26-4

Theoretical Analysis

MedKoo Cat#: 574585
Name: OBAA
CAS#: 221632-26-4
Chemical Formula: C28H44O3
Exact Mass: 428.329
Molecular Weight: 428.66
Elemental Analysis: C, 78.46; H, 10.35; O, 11.20

Price and Availability

Size Price Availability Quantity
10.0mg USD 325.0 2 Weeks
50.0mg USD 1050.0 2 Weeks
Bulk inquiry

Synonym: OBAA

IUPAC/Chemical Name: 4-(4-Octadecylphenyl)-4-oxobutenoic acid


InChi Code: InChI=1S/C28H44O3/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-25-19-21-26(22-20-25)27(29)23-24-28(30)31/h19-24H,2-18H2,1H3,(H,30,31)/b24-23+


Appearance: 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

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 428.66 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

Molarity Calculator

Calculate the mass, volume, or concentration required for a solution.

*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Dilution Calculator

Calculate the dilution required to prepare a stock solution.

1. Kohler et al (1991) Phospholipase-A2 inhibition by alkylbenzoyl acrylic acids. Agents Actions 32 70 PMID: 2058477


10.0mg / USD 325.0