Safety data sheet
According to EC Directive 91/155/EEC
1. Identification of the substance/preparation and of the company/undertaking
Identification of the product
Catalogue No.: 159222
Product name: Potassium hydroxide Reag. Ph Eur

Manufacturer/supplier identification
Company: Merck Ltd.
9th Floor, Monterey Tower, 2170 New Petchburi Road, Bangkapi, Huaykwang, Bangkok 10320
Tel: (662) 308 - 0218

2. Composition/information on ingredients
caustic potash ; potassium hydrate ; potassium oxide hydrate

CAS-No.: 1310-58-3 EC-Index-No.: 019-002-00-8
Molar mass: 56.11 EINECS-No.: 215-181-3
Molecular formula: KOH

3. Hazards identification
Causes severe burns.

4. First aid measures
After inhalation: fresh air. Summon doctor.
After skin contact: wash off with plenty of water. Dab with polyethylene glycol 400. Immediately remove contaminated clothing.
After eye contact: rinse out with plenty of water for at least 10 minutes with the eyelid held wide open. Immediately summon eye specialist.
After swallowing: make victim drink plenty of water (if necessary several litres), avoid vomiting (risk of perforation!). Immediately summon doctor. Do not attempt to neutralize.

5. Fire-fighting measures
Suitable extinguishing media:
In adaption to materials stored in the immediate neighbourhood.

Special risks:

Other information:

6. Accidental release measures
Person-related precautionary measures:
Avoid generation of dusts; do not inhale dusts.

Procedures for cleaning / absorption:
Carefully take up dry. Forward for disposal. Clean up affected area.

Additional notes:
Render harmless: neutralize with dilute sulfuric acid.

7. Handling and storage
No further requirements.

Tightly closed. Dry. At +15C to +25C.

Requirements for storage rooms and containers:
No aluminium, tin, or zinc containers.

8. Exposure controls/personal protection
Personal protective equipment:
Respiratory protection: required when dusts are generated.
Eye protection: required
Hand protection: required
Industrial hygiene: Immediately change contaminated clothing. Apply skin- protective barrier cream. Wash hands and face after working with substance.

9. Physical and chemical properties
Form: solid
Colour: white
Odour: odourless
pH value
at 50 g/l water (20 C) > 13.5
Melting temperature 360 C
Boiling temperature 1320 C
Ignition temperature not available
Flash point not available
Explosion limits lower not available
upper not available
Density (20 C) 2.04 g/cm3
Solubility in water (20 C) ประมาณ 1100 g/l
ethanol (20 C) ประมาณ 400 g/l

10. Stability and reactivity
Conditions to be avoided
no information available

Substances to be avoided
metals (in the presence of atmospheric oxygen and/or moisture) , light metals : Formation of: hydrogen ;
ammonium compounds : Formation of: ammonia ;
alkaline earth metals , halogens , halogen-halogen compounds , halogenated hydrocarbons , nonmetallic oxyhalides , halogen oxides , organic nitro compounds , phosphorus , nonmetallic oxides , hydrocarbons , anhydrides , strong acids

Hazardous decomposition products
no information available

Further information
extremely hygroscopic ; exothermic dissolution process with water ;
incompatible with metals , various plastics , glass , animal/vegetable tissues

11. Toxicological information
Acute toxicity
LD50 (oral, rat): 273 mg/kg

Further toxicological information
After contact with substance: Burns of: skin , mucous membranes , eyes ( Risk of corneal clouding. )
After swallowing: Burns of: oesophagus , stomach ( strong pain (risk of perforation!) ; dizziness

12. Ecological information
Ecotoxic effects:
Biological effects: Harmful effect due to pH shift. Caustic even in diluted form.
Toxic for aquatic organisms. LC50: 10 mg/l /96 h

Further ecologic data:
Do not allow to enter waters, waste water, or soil!

13. Disposal considerations
There are no uniform EC Regulations for the disposal of chemicals or residues. Chemical residues generally count as special waste. The disposal of the latter is regulated in the EC member countries through corresponding laws and regulations. We recommend that you contact either the authorities in charge or approved waste disposal companies which will advise you on how to dispose of special waste.

Disposal in compliance with official regulations. Handle contaminated packaging in the same way as the substance itself. If not officially specified differently, non-contaminated packaging may be treated like household waste or recycled.

14. Transport information
Transport over land ADR/RID and GGVS/GGVE (Germany)
GGVS/GGVE class: 8 Number and letter: 41b
ADR/RID class: 8 Number and letter: 41b
Name of material: 1813 KALIUMHYDROXID, FEST

River transport ADN/ADNR
not examined

Sea transport IMDG
IMDG class: 8 UN-No.: 1813 Packaging group: II
Ems: 8-06 MFAG: 705
Correct technical name: POTASSIUM HYDROXIDE,SOLID

Air transport ICAO-TI and IATA-DGR
ICAO/IATA class: 8 UN/ID-No.: 1813 Packaging group: II
Correct technical name: POTASSIUM HYDROXIDE,SOLID

The transport regulations are cited according to international regulations and in the form applicable in Germany (GGVS/GGVE). Possible national deviations in other countries are not considered.

15. Regulatory information
Labelling according to EC Directives
Symbol: C Corrosive immediately and show this container or label.
R-phrases: R 35 Causes severe burns.
S-phrases: S 26-37/39-45 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable gloves and eye/face protection. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
EC-No.: 215-181-3 EC label

German regulations
Water pollution class 1 (slightly polluting substance)

16. Other information
Reason for alteration
General update. Change in labelling.