Thiazolo[5,4-d]thiazole CAS 251-56-9
| CAS No. | 251-56-9 |
| Molecular Formula | C4H2N2S2 |
| Molecular Weight | 142.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Thiazolo[5,4-d]thiazole.
CATO supplies Thiazolo[5,4-d]thiazole (CAS 251-56-9), a certified reference material (molecular formula C4H2N2S2, MW 142.20 g/mol) for analytical method development and quality control.
Structurally, Thiazolo[5,4-d]thiazole (C4H2N2S2) contains a nitrile group, sulfur-containing functionality. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 142.20 g/mol, it falls into the low-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C4H2N2S2 |
| Molecular Weight | 142.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Thiazolo Standards
- thiazolo[5,4-c]pyridine (CAS 273-70-1)
- Thiazolo[4,5-b]pyrazine (CAS 274-00-0)
- Thiazolo[4,5-d]pyrimidine (CAS 273-99-4)
- thiazolo[5,4-d]pyrimidine (CAS 273-86-9)
- Thiazolo[4,5-b]pyridine (CAS 273-98-3)
- Thiazolo[4,5-c]pyridine (CAS 273-75-6)
- Thiazolo[5,4-b]pyridine (CAS 273-84-7)
- 2-methyl-[1,3]thiazolo[4,5-c]pyridine (CAS 89786-57-2)
Recommended Standards
- tert-Butyl Cyclopropanecarboxylate (CAS 87661-20-9)
- Cis-4-Methylcyclohexanecarboxylic acid (CAS 934-67-8)
- tert-butyl But-2-enoate (CAS 3246-27-3)
- trans-4-Aminocyclohexane-1-carboxamide (CAS 791775-31-0)
- 2-(1-((4-Chlorophenyl)sulfonyl)piperidin-4-yl)benzo[d]thiazole (CAS 605628-18-0)
- 4-Amino-2-chloro-3-nitropyridine (CAS 2789-25-5)
- Ethyl (4Z)-2,2-bis[(2,4-dichlorophenyl)methyl]-5-(dimethylamino)-3-oxopent-4-enoate (CAS 478033-78-2)
- 6,8-Dichloro-1,2,3,4-tetrahydro-5H-benzo[b]azepin-5-one (CAS 886367-28-8)
- (4-Carboxyphenyl)diphenylphosphine 2129-31-9 4-(Diphenylphosphino)benzoic acid Diphenyl(p-carboxyphenyl) phosphine p-(Diphenylphosphino)benzoic acid (CAS 2129-31-9)
- 2,5-Dichlorobenzooxazole (CAS 3621-81-6)
- 1,2,4-Triazine-5-carboxylic acid (CAS 1260664-79-6)
- 5-Methyl-4-nitro-2H-pyrazole-3-carboxylic Acid Amide (CAS 1228362-74-0)
- N-Desmethyl Zopiclone-d8 Hydrochloride (CAS 1189719-74-1)
- Osteogenic Growth Peptide (CAS 132996-61-3)
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