MTS Reagent - ≥95%(HPLC) , CAS No.138169-43-4

CAS: 138169-43-4 Cat. No.: M275698 Formula: C20H17N5O6S2 Molecular Weight: 487.515
AVAILABLE TO ORDER
GRADE & PURITY ≥95%(HPLC)
Synonyms
5-[3-(carboxymethoxy)phenyl]-2-(4,5-dimethyl-1,3-thiazol-2-yl)-3-(4-sulfonatophenyl)-3H-1,2,3,4-tetrazol-2-ylium | FT-0629025 | 5-[3-(Carboxymethoxy)phenyl]-3-(4,5-dimethyl-2-thiazolyl)-2-(4-sulfophenyl)-2H-tetrazolium inner salt | 3-(4,5-Dimethylthiazol-
Storage
Store at 2-8°C,Protected from light,Argon charged,Desiccated
Shipped In
Wet ice
★
Size
Germany (EU)
USA*
Price
Qty
100mg
M275698-100mg
Made to order · 8–12 wks
€164.78
250mg
M275698-250mg
Made to order · 8–12 wks
€303.62
1g
M275698-1g
—
1 In stock
€616.01
Enter a quantity for the sizes you want to add.
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Why this grade

≥95%(HPLC) for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Store at 2-8°C,Protected from light,Argon charged,Desiccated Ships Wet ice Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 4 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

MTS reagent is one of the most common water-soluble tetrazolium reagents that are widely used to quantify cell viability by absorption spectrophotometry. A variety of tetrazolium inner salts are used for determining cell viability in proliferation assays by monitoring their color changes. Metabolically active cells reduce colorless tetrazolium inner salts into the colored formazan products that might be either soluble or insoluble in cell culture media depending on the structures of tetrazolium reagents. The conversion of tetrazolium inner salts to formazans is thought to be carried out by NAD(P)H-dependent dehydrogenase enzymes.

Application:

Cell Viability Assay; Cell Proliferation Assay; Cytotoxicity Assay

Specifications

Synonyms
5-[3-(carboxymethoxy)phenyl]-2-(4,5-dimethyl-1,3-thiazol-2-yl)-3-(4-sulfonatophenyl)-3H-1,2,3,4-tetrazol-2-ylium | FT-0629025 | 5-[3-(Carboxymethoxy)phenyl]-3-(4,5-dimethyl-2-thiazolyl)-2-(4-sulfophenyl)-2H-tetrazolium inner salt | 3-(4,5-Dimethylthiazol-
Specifications & Purity
≥95%(HPLC)
Stability And Storage
Store at 2-8℃ long term (1 year).Store in the dark. Desiccated. Under Inert Atmosphere.
Storage
Store at 2-8°C,Protected from light,Argon charged,Desiccated
Shipped In
Wet ice
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥95%(HPLC)
Names and Identifiers
Canonical Smiles
CC1=C(SC(=N1)[N+]2=NC(=NN2C3=CC=C(C=C3)S(=O)(=O)[O-])C4=CC(=CC=C4)OCC(=O)O)C
IUPAC Name
4-[5-[3-(carboxymethoxy)phenyl]-3-(4,5-dimethyl-1,3-thiazol-2-yl)tetrazol-3-ium-2-yl]benzenesulfonate
InChIKey
APRZHQXAAWPYHS-UHFFFAOYSA-N
INCHI
1S/C20H17N5O6S2/c1-12-13(2)32-20(21-12)25-23-19(14-4-3-5-16(10-14)31-11-18(26)27)22-24(25)15-6-8-17(9-7-15)33(28,29)30/h3-10H,11H2,1-2H3,(H-,26,27,28,29,30)
Isomeric SMILES
CC1=C(SC(=N1)[N+]2=NC(=NN2C3=CC=C(C=C3)S(=O)(=O)[O-])C4=CC(=CC=C4)OCC(=O)O)C
Molecular Weight
487.515
Reaxy-Rn
24181324
Reaxys-RN_link_address
https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=24181324&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

<<<<<<< HEAD Download SDS → ======= Download SDS → >>>>>>> release248-p3

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassAzoles
SubclassTetrazoles
Intermediate Tree Nodes Not available
Direct ParentPhenyltetrazoles and derivatives
Alternative Parents Phenoxyacetic acid derivatives  Benzenesulfonic acids and derivatives  1-sulfo,2-unsubstituted aromatic compounds  Benzenesulfonyl compounds  Phenoxy compounds  Phenol ethers  2,4,5-trisubstituted thiazoles  Alkyl aryl ethers  Sulfonyls  Organosulfonic acids  Heteroaromatic compounds  Carboxylic acids  Azacyclic compounds  Monocarboxylic acids and derivatives  Organopnictogen compounds  Carbonyl compounds  Organic zwitterions  Organonitrogen compounds  Hydrocarbon derivatives  Organic oxides  
Molecular FrameworkAromatic heteromonocyclic compounds
Substituents Phenoxyacetate - Phenyltetrazole - Benzenesulfonate - Arylsulfonic acid or derivatives - Benzenesulfonyl group - 1-sulfo,2-unsubstituted aromatic compound - 2,4,5-trisubstituted 1,3-thiazole - Phenoxy compound - Phenol ether - Alkyl aryl ether - Monocyclic benzene moiety - Benzenoid - Organic sulfonic acid or derivatives - Thiazole - Sulfonyl - Organosulfonic acid - Heteroaromatic compound - Organosulfonic acid or derivatives - Carboxylic acid derivative - Carboxylic acid - Ether - Monocarboxylic acid or derivatives - Azacycle - Organonitrogen compound - Organopnictogen compound - Organic oxygen compound - Organic nitrogen compound - Carbonyl group - Organooxygen compound - Organosulfur compound - Hydrocarbon derivative - Organic oxide - Organic zwitterion - Aromatic heteromonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as phenyltetrazoles and derivatives. These are compounds containing a phenyltetrazole skeleton, which consists of a tetrazole bound to a phenyl group.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates (CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

6 results found

Lot NumberCertificate TypeDateItem
I2617211I2617211Certificate of AnalysisSep 05, 2026 M275698
I2617212I2617212Certificate of AnalysisSep 05, 2026 M275698
I2617213I2617213Certificate of AnalysisSep 05, 2026 M275698
C2605583C2605583Certificate of AnalysisDec 16, 2025 M275698
C2605584C2605584Certificate of AnalysisDec 16, 2025 M275698
C2605587C2605587Certificate of AnalysisDec 16, 2025 M275698
Chemical and Physical Properties
SolubilitySoluble in water.
Molecular Weight487.500 g/mol
XLogP34.800
Hydrogen Bond Donor Count1
Hydrogen Bond Acceptor Count10
Rotatable Bond Count6
Exact Mass487.062 Da
Monoisotopic Mass487.062 Da
Topological Polar Surface Area188.000 Ų
Heavy Atom Count33
Formal Charge0
Complexity777.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
FAQs and Articles
Citations of This Product
Solution Calculators
Reviews

Customer Reviews

Frequently Asked Questions

What is the purity of this product, and how is it determined?
This product is supplied at ≥95% purity, determined by HPLC. Lot-specific values are stated on the Certificate of Analysis.
How should this product be stored?
Store at 2–8 °C, protected from light, desiccated, under argon. It is supplied under an argon blanket; reseal under inert gas after each use.
How is this product shipped?
This product ships chilled on wet ice. Unpack on arrival and transfer it to the storage condition stated above.
What are the CAS number, molecular formula and molecular weight?
The CAS Number is 138169-43-4, the molecular formula is C20H17N5O6S2, and the molecular weight is 487.515 g/mol. InChIKey APRZHQXAAWPYHS-UHFFFAOYSA-N.
What documentation is provided?
Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.
What is the purity of this product, and how is it determined?
This product is supplied at ≥95% purity, determined by HPLC. Lot-specific values are stated on the Certificate of Analysis.
How should this product be stored?
Store at 2–8 °C, protected from light, desiccated, under argon. It is supplied under an argon blanket; reseal under inert gas after each use.
How is this product shipped?
This product ships chilled on wet ice. Unpack on arrival and transfer it to the storage condition stated above.
What are the CAS number, molecular formula and molecular weight?
The CAS Number is 138169-43-4, the molecular formula is C20H17N5O6S2, and the molecular weight is 487.515 g/mol. InChIKey APRZHQXAAWPYHS-UHFFFAOYSA-N.
What documentation is provided?
Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.

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