Potassium Hydroxide
Plain text
Chemfused. (2026). Potassium Hydroxide, CAS 1310-58-3. Retrieved 2026-04-29 from https://chemfused.com/cas/1310-58-3
BibTeX
@misc{chemfused-cas-1310583,
title = {Potassium Hydroxide, CAS 1310-58-3},
author = {Chemfused},
year = {2026},
url = {https://chemfused.com/cas/1310-58-3},
urldate = {2026-04-29}
}
Potassium Hydroxide (CAS 1310-58-3) is a chemical compound with molecular formula HKO and molecular weight 56.11 g/mol . GHS signal word: Danger. Hazard classifications: Corrosive, Toxic, Health Hazard, Serious Health Hazard.
What is Potassium Hydroxide?
- Molecular Formula
- HKO
- Molecular Weight
- 56.11 g/mol
- Melting Point
- 680 °F approximately (NTP, 1992)
- Boiling Point
- greater than 266 °F at 760 mmHg (USCG, 1999)
- Density
- 1.45 to 1.50 at 68 °F (USCG, 1999)
- Solubility
- 107 g/100 cc at 59 °F (NTP, 1992)
Description
Potassium hydroxide is an alkali metal hydroxide.
Structure Identifiers
- SMILES
- [OH-].[K+]
- InChI
- InChI=1S/K.H2O/h;1H2/q+1;/p-1
- InChIKey
- KWYUFKZDYYNOTN-UHFFFAOYSA-M
Properties
Computed
Calculated molecular descriptors used in drug design and computational chemistry.
- Exact Mass
- 55.9664 Da
- TPSA
- 1.0 Ų
- H-Bond Donors
- 1
- H-Bond Acceptors
- 1
- Complexity
- 2
- Formal Charge
- 0
Experimental
Measured physical and chemical properties from experimental literature.
- Color / Form
- White or colorless, orthorhombic, deliquescent pieces, lumps, or sticks having crystalline fracture
- Odor
- Odorless
- Vapor Pressure
- 1 mmHg at 1326 °F ; 5 mmHg at 1497 °F (NTP, 1992)
- pH
- Strongly alkaline (1 % solution)
- Decomposition
- When heated to decomposition it emits toxic fumes of K2O.
- Other
- Hygroscopic
Safety information
Signal Word
GHS Pictograms
GHS05
GHS06
GHS07
GHS08
Hazard Statements
- H290 May be corrosive to metals
- H301 Toxic if swallowed
- H302 Harmful if swallowed
Precautionary Statements
- P234 Keep only in original container
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P270 Do not eat, drink or smoke when using this product
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting
- P304+P340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P321 Specific treatment (see supplemental first aid instructions on this label)
- P330 Rinse mouth
- P331 Do NOT induce vomiting
- P363 Wash contaminated clothing before reuse
- P390 Absorb spillage to prevent material damage
- P405 Store locked up
- P406 Store in a corrosive resistant container with a resistant inner liner
- P501 Dispose of contents/container to an approved waste disposal plant
Synonyms (158)
- KOH
- E-525
- P2844
- P2849
- D01168
- UN1813
- UN1814
- DB11153
- F044688
- F983742
- FP34861
- INS-525
- Potassa
- Q132298
- Aetzkali
- 1310-58-3
- 215-181-3
- HSDB 1234
- Kalilauge
- CCRIS 6569
- INS NO.525
- NS00081389
- Potash lye
- SCHEMBL135
- WZH3C48M4T
- CHEBI:32035
- DTXCID209633
- EC 215-181-3
- MFCD00003553
- RefChem:6672
- AKOS015904616
- CHEMBL2103983
- DTXSID5029633
- Caustic potash
- Caustic-potash
- Cyantek CC 723
- Kali causticum
- Kaliumhydroxid
- SCHEMBL6652818
- Caswell No. 693
- Kaliumhydroxyde
- UNII-WZH3C48M4T
- EINECS 215-181-3
- Potasse caustique
- Potassium hydrate
- hydroxyl potassium
- potasium hydroxide
- potassium hydoxide
- potassium hydroxid
- potassium hyroxide
Show 108 more names Show fewer names
- potassiumhydroxide
- potassium hydorxide
- POTASSIUM HYDROXIDE
- potassium;hydroxide
- MIRACLE WATER 3 in 1
- potassium -hydroxide
- KALI CAUSTICUM [HPUS]
- Hydroxyde de potassium
- 11M Potassium hydroxide
- Potassio (idrossido di)
- 0.1M Potassium hydroxide
- 0.5M Potassium hydroxide
- Potassium (hydroxyde de)
- POTASSIUM HYDROXIDE [II]
- POTASSIUM HYDROXIDE [MI]
- Potassium hydroxide (KOH)
- POTASSIUM HYDROXIDE [FCC]
- Potassium hydroxide [JAN]
- Potasse caustique [French]
- Potassium Hydroxide (~85%)
- POTASSIUM HYDROXIDE [HSDB]
- Potassium hydroxide, flake
- Potassium hydroxide, solid
- Potassium hydroxide (K(OH))
- POTASSIUM HYDROXIDE [MART.]
- POTASSIUM HYDROXIDE [VANDF]
- Potassium Hydroxide, flakes
- Potassium Hydroxide (Powder)
- Potassium hydroxide [JAN:NF]
- POTASSIUM HYDROXIDE [WHO-DD]
- Potassium hydroxide, pellets
- Potassium hydroxide (JP18/NF)
- Potassium Hydroxide (Pellets)
- Potassium hydroxide anhydrous
- Potassium hydroxide on alumina
- Potassium hydroxide, p.a., 85%
- Hydroxyde de potassium [French]
- Potassium Hydroxide, powder, ACS
- Potassio (idrossido di) [Italian]
- Potassium (hydroxyde de) [French]
- EPA Pesticide Chemical Code 075602
- POTASSIUM HYDROXIDE [EP MONOGRAPH]
- Potassium Hydroxide 50%w/w aq soln
- 0.1M Potassium hydroxide, alcoholic
- 0.5m Potassium Hydroxide, Alcoholic
- Potassium hydroxide solution alcoholic
- Potassium hydroxide, AR, flakes, >=85%
- Potassium hydroxide, LR, flakes, >=85%
- Potassium hydroxide, AR, pellets, >=85%
- Potassium hydroxide, LR, pellets, >=85%
- Potassium hydroxide in alcohol (10% v/v)
- Potassium hydroxide, pellet, ACS reagent
- Potassium Hydroxide (Semiconductor Grade)
- Potassium hydroxide, pellets, ACS reagent
- Potassium hydroxide, technical grade, 80%
- Potassium hydroxide, technical, >=85%, lumps
- Potassium hydroxide, BioXtra, >=85% KOH basis
- Potassium hydroxide, SAJ first grade, >=85.0%
- Potassium hydroxide, technical, >=85%, powder
- Potassium hydroxide, JIS special grade, >=85.0%
- Potassium hydroxide, reagent grade, 90%, flakes
- Potassium hydroxide, ROTI?Volum, 0,1N (Ampoule)
- Potassium hydroxide, ACS reagent, >=85%, pellets
- Potassium hydroxide, solid [UN1813] [Corrosive]
- Potassium hydroxide, tested according to Ph.Eur.
- Potassium hydroxide, electronic grade, 50% in H2O
- Potassium hydroxide solution 10% (wt/v) in methanol
- Potassium hydroxide, >=85% KOH basis, pellets, white
- Potassium hydroxide, puriss. p.a., >=86% (T), pellets
- Non aqueous titrant 0.1N potassium hydroxide in ethanol
- Non aqueous titrant 0.5N potassium hydroxide in ethanol
- Non aqueous titrant 1.0N potassium hydroxide in ethanol
- Potassium hydroxide, pellets, Trace Metals Grade 99.95%
- Base Number (BN) Standard: 6 mg KOH/g in Hydrocarbon Oil
- Base Number (BN) Standard: 10 mg KOH/g in Hydrocarbon Oil
- Base Number (BN) Standard: 15 mg KOH/g in Hydrocarbon Oil
- Base Number (BN) Standard: 30 mg KOH/g in Hydrocarbon Oil
- Base Number (BN) Standard: 40 mg KOH/g in Hydrocarbon Oil
- Base Number (BN) Standard: 70 mg KOH/g in Hydrocarbon Oil
- Acid Number (AN) Standard: 0.1 mg KOH/g in Hydrocarbon Oil
- Acid Number (AN) Standard: 0.5 mg KOH/g in Hydrocarbon Oil
- Acid Number (AN) Standard: 1.0 mg KOH/g in Hydrocarbon Oil
- Acid Number (AN) Standard: 1.5 mg KOH/g in Hydrocarbon Oil
- Acid Number (AN) Standard: 2.0 mg KOH/g in Hydrocarbon Oil
- Acid Number (AN) Standard: 3.0 mg KOH/g in Hydrocarbon Oil
- Chinese Pharmacopoeia 0.1M Potassium Hydroxide in Methanol
- Potassium hydroxide, anhydrous, >=99.97% trace metals basis
- USP Solution Potassium Hydroxide, Normal (1 N) Conforms to USP
- Potassium hydroxide, puriss. p.a., Reag. Ph. Eur., >=85%, pellets
- Potassium hydroxide, semiconductor grade PURANAL(TM) (Honeywell 17851)
- Potassium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 0.1N
- Potassium hydroxide, Acculute Standard Volumetric Solution, Final Concentration 1.0N
- Reagecon Potassium Hydroxide Alcoholic 0.1M according to Chinese Pharmacopoeia (ChP)
- Potassium hydroxide solution in ethanol, 0,05 mol/l, 0,05 N volumetric standard solution
- Reagecon Potassium Hydroxide Alcoholic 0.1M according to United States Pharmacopoeia (USP)
- Reagecon Potassium Hydroxide Alcoholic 0.5N according to United States Pharmacopoeia (USP)
- Acid Number Standard 0.1 mgKOH/g. Reference materials intended for use in the determination of Acid
- Acid Number Standard 0.5 mgKOH/g. Reference materials intended for use in the determination of Acid
- Acid Number Standard 1 mgKOH/g. Reference materials intended for use in the determination of Acid Nu
- Acid Number Standard 2 mgKOH/g. Reference materials intended for use in the determination of Acid Nu
- Acid Number Standard 3 mgKOH/g. Reference materials intended for use in the determination of Acid Nu
- Base Number Standard 10 mgKOH/g. Reference material intended for use in the determination of Base Nu
- Base Number Standard 30 mgKOH/g. Reference materials intended for use in the determination of Base N
- Base Number Standard 6 mgKOH/g. Reference materials intended for use in the determination of Base Nu
- Potassium hydroxide, puriss., meets analytical specification of Ph. Eur., BP, NF, 85-100.5%, pellets
- Reagecon Total Acid Number (TAN) Standard 4.5 mg/g Potassium Hydroxide (KOH) in Synthetic Base Oil Matrix
- Potassium hydroxide, semiconductor grade, pellets, 99.99% trace metals basis (Purity excludes sodium content.)
- Acid Number Standard 1.5 mgKOH/g. Reference materials intended for use in the determination of Acid Number in petroleum products by potentiometric titration (ASTM D664) or color-indicator titration
Frequently asked questions
What is the CAS number of Potassium Hydroxide?
The CAS Registry Number for Potassium Hydroxide is 1310-58-3.
What is the molecular formula of Potassium Hydroxide?
Potassium Hydroxide has the molecular formula HKO and a molecular weight of 56.11 g/mol.
What is the SMILES notation for Potassium Hydroxide?
The SMILES notation for Potassium Hydroxide is [OH-].[K+].
What is the melting point of Potassium Hydroxide?
The melting point of Potassium Hydroxide is 680 °F approximately (NTP, 1992).
What is the boiling point of Potassium Hydroxide?
The boiling point of Potassium Hydroxide is greater than 266 °F at 760 mmHg (USCG, 1999).
What is the density of Potassium Hydroxide?
The density of Potassium Hydroxide is 1.45 to 1.50 at 68 °F (USCG, 1999).
How soluble is Potassium Hydroxide?
Solubility of Potassium Hydroxide: 107 g/100 cc at 59 °F (NTP, 1992).
Is Potassium Hydroxide hazardous?
Potassium Hydroxide carries the following GHS hazard classifications: Corrosive, Toxic, Health Hazard, Serious Health Hazard. Signal word: Danger.
What are other names for Potassium Hydroxide?
Potassium Hydroxide is also known as 0.1M Potassium hydroxide, 0.1M Potassium hydroxide, alcoholic, 0.5M Potassium hydroxide, 0.5m Potassium Hydroxide, Alcoholic, 11M Potassium hydroxide.
Data sourced from PubChem CID 14797. Last updated .
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