| Identification | More | 【Name】
Potassium hydroxide | 【CAS】
1310-58-3 | 【Synonyms】
CAUSTIC POTASH
KALII HYDROXIDUM
KOH
LYE
POTASH
POTASH CAUSTIC
POTASH LYE
POTASSIUM HYDRATE
POTASSIUM HYDROXIDE
POTASSIUM HYDROXIDE ETHANOLIC
POTASSIUM HYDROXIDE STANDARD
POTASSIUM OXIDE HYDRATE
Causicpotash
causticpotashsolutions
Hydroxyde de potassium
hydroxydedepotassium
hydroxydedepotassium(french)
hydroxydedepotassium(solide)
hydroxydedepotassium(solutions)
Kaliumhydroxid | 【EINECS(EC#)】
215-181-3 | 【Molecular Formula】
HKO | 【MDL Number】
MFCD00003553 | 【Molecular Weight】
56.11 | 【MOL File】
1310-58-3.mol |
| Chemical Properties | Back Directory | 【Appearance】
white crystals, flakes, sticks or pellets | 【mp 】
361 °C(lit.)
| 【bp 】
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
| 【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. | 【Water Solubility 】
soluble | 【Sensitive 】
Air Sensitive & Hygroscopic | 【Merck 】
14,7640 | 【CAS DataBase Reference】
1310-58-3(CAS DataBase Reference) | 【NIST Chemistry Reference】
Potassium hydroxide(1310-58-3) | 【EPA Substance Registry System】
1310-58-3(EPA Substance) |
| Safety Data | Back Directory | 【Hazard Codes 】
C,F,T,Xi | 【Risk Statements 】
R34:Causes burns.
R35:Causes severe burns.
R22:Harmful if swallowed.
R11:Highly Flammable.
R39/23/24/25:Toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed .
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed .
R36/38:Irritating to eyes and skin .
R36/37:Irritating to eyes and respiratory system .
R67:Vapors may cause drowsiness and dizziness. | 【Safety Statements 】
S7:Keep container tightly closed .
S16:Keep away from sources of ignition - No smoking .
S36/37:Wear suitable protective clothing and gloves .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . | 【RIDADR 】
UN 2924 3/PG 2
| 【WGK Germany 】
1
| 【RTECS 】
TT2100000
| 【F 】
3 | 【HazardClass 】
8 | 【PackingGroup 】
II | 【Hazardous Substances Data】
1310-58-3(Hazardous Substances Data) |
| Hazard Information | Back Directory | 【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. | 【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, [DRY SOLID, FLAKE, BEAD, OR GRANULAR] 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]. | 【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 | 【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. |
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