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Potassium hydroxide

CAS No. 1310-58-3
Chemical Name: Potassium hydroxide
Synonyms: KOH;LYE;POTASH;Potassa;Potassio;POTASH LYE;KOH/CH63857;Causicpotash;potassium lye;normanal0,1-N
CBNumber: CB3107908
Molecular Formula: HKO
Formula Weight: 56.11
MOL File: 1310-58-3.mol
Potassium hydroxide Property
Melting point : 361 °C(lit.)
Boiling point : 1320°C
density : 1.450 g/mL at 20 °C
vapor pressure : 1 mm Hg ( 719 °C)
refractive index : n20/D 1.421
Fp : 52 °F
storage temp. : 0-6°C
solubility : H2O: 1 M at 20 °C, clear, colorless
form : powder
color : white
PH: 14 (56g/l, H2O, 20℃)
Water Solubility : soluble
Sensitive : Air Sensitive & Hygroscopic
Merck : 14,7640
Stability:: Stable, but very hygroscopic. Dissolves exothermically in water. Incompatible with most metals, strong acids, acid chlorides, organic materials, zinc, aluminium, nitroalkanes, nitrobenzene, chlorine dioxide. Reacts vigorously with a wide variety of other materials. Readily absorbs water and carbon dioxide from the air.
CAS DataBase Reference: 1310-58-3(CAS DataBase Reference)
NIST Chemistry Reference: Potassium hydroxide(1310-58-3)
EPA Substance Registry System: Potassium hydroxide (K(OH))(1310-58-3)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes : C,F,T,Xi
Risk Statements : 34-35-22-11-39/23/24/25-23/24/25-36/38-36/37-67-52/53
Safety Statements : 7-16-36/37-45-36/37/39-26-61
RIDADR : UN 2924 3/PG 2
WGK Germany : 1
RTECS : TT2100000
F : 3
TSCA : Yes
HazardClass : 8
PackingGroup : II
Hazardous Substances Data: 1310-58-3(Hazardous Substances Data)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H303 May be harmfulif swallowed Acute toxicity,oral Category 5 P312
H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,P403+P233, P405, P501
H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P321 Specific treatment (see … on this label).
P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P332+P313 IF SKIN irritation occurs: Get medical advice/attention.
P337+P313 IF eye irritation persists: Get medical advice/attention.
P405 Store locked up.

Potassium hydroxide Chemical Properties,Usage,Production

Chemical Properties
white crystals, flakes, sticks or pellets
Uses
Used in alkalimetric titrations.
General Description
A white solid. Corrosive to metals and tissue. Used in soap manufacture, bleach, as an electrolyte in alkaline batteries, and as a food additive.
Air & Water Reactions
Hydrolysis generates enough heat to ignite adjacent combustible material [Haz. Chem. Data 1966]. Dissolves in water (with liberation of heat, may steam and spatter. Solution is basic (alkaline). Deliquescent
Reactivity Profile
POTASSIUM HYDROXIDE absorbs moisture readily forming caustic solution that attacks aluminum and zinc. A piece of potassium hydroxide causes liquid chlorine dioxide to explode [Mellor 2:289. 1946-47]. 1,2-dichloroethylene and potassium hydroxide forms chloroacetylene, which is explosive and spontaneously flammable in air. Potassium hydroxide is highly toxic [Rutledge 1968. p. 134]. A reaction between n-nitrosomethylurea and potassium hydroxide in n-butyl ether resulted in an explosion due to the formation of diazomethane [Schwab 1972]. Potassium persulfate and a little potassium hydroxide and water ignited a polythene (polyethylene) liner of a container by release of heat and oxygen [MCA Case History 1155. 1955]. Using potassium hydroxide to dry impure tetrahydrofuran, which contains peroxides, may be hazardous. Explosions have occurred in the past. Sodium hydroxide behaves in a similar way as potassium hydroxide [NSC Newsletter Chem. Soc. 1967]. A strong base. Forms caustic solution in water. [Merck 11th ed. 1989].
Health Hazard
Causes severe burns of eyes, skin, and mucous membranes.
Fire Hazard
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Potassium hydroxide Preparation Products And Raw materials
Raw materials
Barium chloride dihydrate Potassium fluoride Potassium carbonate Potassium hydroxide solution MERCURY Hydrochloric acid Hydrogen Sodium hydroxide Barium chloride Potassium chloride Graphite Potassium amalgam
Preparation Products
4-(BENZYLTHIO)-3-NITROBENZALDEHYDE POLYETHYLENE GLYCOL MONOOLEYL ETHER 4-[(2-FURYLMETHYL)THIO]-3-NITROBENZALDEHYDE Potassium stearate Potassium tartrate oxalic acid, potassium salt Potassium hydrogen phthalate 2-Allylcyclohexanone 2-Amino-4-trifluoromethylbenzonitrile Organosilicon water-proofing agent 4-ETHOXYPHENYLACETIC ACID 2-BROMO-6-(1H-PYRAZOL-1-YL)PYRIDINE D-Glucosamine hydrochloride antistatic agent F695 4-(CYCLOHEXYLTHIO)-3-NITROBENZALDEHYDE 2-Benzylaminopyridine Potassium sorbate Potassium isobutylxanthate Tripotassium citrate 3,5-DIBROMO-2-ETHOXYBENZALDEHYDE Potassium metavanadate Antistatic agent PK Potassium lactate 2-(2,4-DINITROPHENOXY)ETHANOL Potassium fluoroaluminate 5-Hydroxymethyluracil Potassium citrate Piperonylic acid GELLAN GUM 1,2,3,4-TETRAHYDRO-9H-PYRIDO[3,4-B]INDOLE 4-ISOPROPOXYBENZOIC ACID PYRROLIDONE HYDROTRIBROMIDE 3-ACETYL-2-METHYL-QUINOLINE-4-CARBOXYLIC ACID Potassium titanium oxalate 2,3-Dimethylpyrazine 4-(4-CHLOROPHENYLTHIO)-3-NITROBENZALDEHYDE potassium silicate,electronic grade 2,3-Dimethylthiophene AMYLXANTHIC ACID POTASSIUM SALT Vat Grey M
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