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

MedKoo CAT#: 463682

CAS#: 129425-81-6

Description: MSA 2 is a non-nucleotide STING agonist. It exhibits antitumor activity and stimulates interferon-β secretion in tumors. MSA 2 induces tumor regression with durable antitumor immunity, and synergizes with anti-PD-1 in syngeneic mouse tumor models. It is also orally bioavailable.

Chemical Structure

CAS# 129425-81-6

Theoretical Analysis

MedKoo Cat#: 463682
Name: MSA-2
CAS#: 129425-81-6
Chemical Formula: C14H14O5S
Exact Mass: 294.0562
Molecular Weight: 294.321
Elemental Analysis: C, 57.13; H, 4.79; O, 27.18; S, 10.89

Price and Availability

Size Price Availability Quantity
10.0mg USD 120.0 Ready to ship
25.0mg USD 250.0 Ready to ship
50.0mg USD 450.0 Ready to ship
100.0mg USD 750.0 Ready to ship
200.0mg USD 1150.0 Ready to ship
500.0mg USD 1950.0 Ready to ship
1.0g USD 2950.0 Ready to ship
2.0g USD 5150.0 Ready to ship
5.0g USD 7950.0 2 Weeks
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Synonym: MSA 2; MSA2; MSA-2;

IUPAC/Chemical Name: 4-(5,6-dimethoxybenzo[b]thiophen-2-yl)-4-oxobutanoic acid


InChi Code: InChI=1S/C14H14O5S/c1-18-10-5-8-6-13(9(15)3-4-14(16)17)20-12(8)7-11(10)19-2/h5-7H,3-4H2,1-2H3,(H,16,17)


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: >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

Preparing Stock Solutions

The following data is based on the product molecular weight 294.321 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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10.0mg / USD 120.0