Silicon CAS 7440-21-3
| CAS No. | 7440-21-3 |
| Molecular Formula | H4Si |
| Molecular Weight | 32.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies Silicon (CAS 7440-21-3), a certified reference material (molecular formula H4Si, MW 32.12 g/mol) for analytical method development and quality control.
Owing to an inorganic composition, Silicon is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 32.12 g/mol — guide the selection of appropriate sample preparation and analytical techniques.
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 | H4Si |
| Molecular Weight | 32.12 g/mol |
| Purity | 1000mg/L in 0.1mol/L NaOH |
| Storage | Store at 2-8°C |
| Solubility (reference) | Freely soluble in water |
| Stability | Stable under recommended storage conditions |
| CAS Registry Year (est.) | 1959 |
Related Silicon Standards
- silicon monoxide (CAS 10097-28-6)
- Silicon 2,3-naphthalocyanine bis(trihexylsilyloxide) (CAS 92396-88-8)
- silicon nitride (CAS 12033-89-5)
- Silicon tetrachloride solution (CAS 10026-04-7)
- Silicon in MIBK, 1,000 mg/L, 4 x 25 ml (CAS 4098-30-0)
- Silicon(IV) iodide (99.9%-Si) (CAS 13465-84-4)
- Silicon(IV) 2-ethylhexanoate (CAS 67939-81-5)
- Silicon phthalocyanine dichloride (CAS 19333-10-9)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com