Timolol

Also known as: (S)-timolol, (S)-timolol (anhydrous), (2S)-1-(tert-butylamino)-3-[(4-morpholin-4-yl-1,2,5-thiadiazol-3-yl)oxy]propan-2-ol, Betimol, Blocadren, Istalol, Timoptic, Timoptol, Timacar

Timolol (CAS 26839-75-8) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C13H24N4O3S and a molecular weight of 316.42000 g/mol. Key properties include a melting point of 71.5 - 72.5ºC, a boiling point of 487.2ºC at 760 mmHg, a density of 1.224 g/cm3 and a flash point of 248.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 26839-75-8
Jingsj CID: J-1957197-2
Molecular Formula: C₁₃H₂₄N₄O₃S
Molecular Weight: 316.42000 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	71.5 - 72.5ºC
Boiling Point	487.2ºC at 760 mmHg
Density	1.224 g/cm3
Flash Point	248.5ºC
Exact Mass	316.15700
PSA	107.98000
LogP	0.95840
Vapor Pressure	2.62E-10mmHg at 25°C
Refractive Index	1.548

Activity & Biological Data

Additional Information	[1]. James Barnes; Majid Moshirfar. Timolol. [2]. E. Ansari, et al. Treatment of open-angle glaucoma and ocular hypertension with preservative-free tafuprost/timolol fxed-dose combination therapy: 6 case reports and clinical outcomes. BMC Ophthalmol. 2022 Apr 2;22(1):152. [3]. Figen Amber Cicek, et al. Beta-blocker timolol alleviates hyperglycemia-induced cardiac damage via inhibition of endoplasmic reticulum stress. J Bioenerg Biomembr

Additional Information

[1]. James Barnes; Majid Moshirfar. Timolol. [2]. E. Ansari, et al. Treatment of open-angle glaucoma and ocular hypertension with preservative-free tafuprost/timolol fxed-dose combination therapy: 6 case reports and clinical outcomes. BMC Ophthalmol. 2022 Apr 2;22(1):152. [3]. Figen Amber Cicek, et al. Beta-blocker timolol alleviates hyperglycemia-induced cardiac damage via inhibition of endoplasmic reticulum stress. J Bioenerg Biomembr

Frequently Asked Questions

What is the CAS number of Timolol?

The CAS number of Timolol is 26839-75-8.

What are the molecular formula and molecular weight of Timolol?

Timolol has molecular formula C13H24N4O3S and molecular weight 316.42000 g/mol.

What are the upstream and downstream products of Timolol?

For Timolol, Upstream Products: 4-(Morpholin-4-yl)-1,2,5-thiadiazol-3-ol, 3-Chloro-4-morpholino-1,2,5-thiadiazole, tert-Butylamine; Downstream Products: Timolol maleate.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Timolol (CAS 26839-75-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1957197-2 (accessed 2026-11-09).

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