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Nafcillin sodium monohydrate

Also known as: Nafcillin sodium salt monohydrate, Sodium nafcillin monohydrate, (2S,5R,6R)-6-[(2-ethoxy-1-naphthoyl)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate sodium monohydrate, 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 6-[[(2-ethoxy-1-naphthalenyl)carbonyl]amino]-3,3-dimethyl-7-oxo-, sodium salt, (2S,5R,6R)-, hydrate (1:1:1), Unipen, D00928

Nafcillin sodium monohydrate (CAS 7177-50-6) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C21H23N2NaO6S and a molecular weight of 454.472 g/mol. Key properties include a boiling point of 714.1ºC at 760 mmHg, a density of 1.42 g/cm3 and a flash point of 385.7ºC. It is classified under GHS with signal word Danger and hazard statements H315 — Causes skin irritation, H317 — May cause an allergic skin reaction and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
7177-50-6
Jingsj CID
J-15479-6
Molecular Formula
C21H23N2NaO6S
Molecular Weight
454.472 g/mol
Category
Aromatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point714.1ºC at 760 mmHg
Density1.42 g/cm3
Flash Point385.7ºC
Exact Mass454.117462
PSA133.30000
LogP1.41360

GHS Safety & Compliance

Irritant / Health HazardSignal word: Danger
  • H315 — Causes skin irritation
  • H317 — May cause an allergic skin reaction
  • H319 — Causes serious eye irritation
  • H334 — May cause allergy or asthma symptoms if inhaled
  • H335 — May cause respiratory irritation

Activity & Biological Data

Additional Information[1]. Tan, A.K. and A.L. Fink, Identification of the site of covalent attachment of nafcillin, a reversible suicide inhibitor of beta-lactamase. Biochem J, 1992. 281 ( Pt 1): p. 191-6. [2]. Palmer, D.L., S.B. Pett, and B.F. Akl, Bacterial wound colonization after broad-spectrum versus narrow-spectrum antibiotics. Ann Thorac Surg, 1995. 59(3): p. 626-31.

Frequently Asked Questions

What is the CAS number of Nafcillin sodium monohydrate?

The CAS number of Nafcillin sodium monohydrate is 7177-50-6.

What are the molecular formula and molecular weight of Nafcillin sodium monohydrate?

Nafcillin sodium monohydrate has molecular formula C21H23N2NaO6S and molecular weight 454.472 g/mol.

Is Nafcillin sodium monohydrate hazardous?

Nafcillin sodium monohydrate has GHS signal word Danger and hazard statements H315 — Causes skin irritation; H317 — May cause an allergic skin reaction; H319 — Causes serious eye irritation.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Nafcillin sodium monohydrate (CAS 7177-50-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-15479-6 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.