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

Size Price Shipping out time Quantity
50mg USD 450 2 Weeks
100mg USD 750 2 Weeks
200mg USD 1150 2 Weeks
500mg USD 1950 2 Weeks
1g USD 2950 2 Weeks
2g USD 5150 2 Weeks
5g USD 7950 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2021-02-28. Prices are subject to change without notice.

MSA-2 is in stock.

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)


Solid powder

>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).

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:

Handling Instructions:

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.

Select a batch to recalculate based on the batch molecular weight:
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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