Technical Data sheet

1.        Identification


Product identifier
Other means of identification CAUSTIC SODA FLAKES (sodium hydroxide)




Chemical Description

CAS Registry No                                                    INCI Name


Sodium Hydroxide


Sodium Hydroxide


  1. General Description


Caustic soda flakes is obtained from sodium hydroxide – technical grade, by electrolytic process.

It is a solid white, hygroscopic, odorless substance. Caustic soda flakes easily dissolves in water, with heat release. The product is soluble in methyl andethyl alcohols. Sodium hydroxide is a strong electrolyte (completely ionized both in crystalline and solution states). Sodium hydroxide is not volatile, but it rises easily in air as aerosols. It is insoluble in ethyl ether.



  1. Technical properties



characteristics MU Values Test method
Appearance flakes visual
Sodium hydroxide (NaOH), min % 98 STAS 3068
Sodium chloride (NaCl), max % 0.15 STAS 3068
Iron oxides (Fe2O3), max. % 0.004 STAS 3068


The values of those characteristics are approximated, and are only for general information and are not part of the technical quality conditions.









Specific Properties
 PH strongly alkaline
Boiling point 1390°C
Ignition temperature not ignitable
Relative density (water=1) 2.13 at 25°C
Melting point 318°C









Standard Packaging and shipping Information

palletized polyethylene bags of 25 kg (permissible variation ±0.2kg) 1 ton (permissible variation ±5 kg) bags made of polypropylene lined with polyethylene.


 Storage & Handling:

Keep the product in tightly closed and properly labeled containers. Do not store caustic soda flakes in aluminum container as flammable hydrogen gas can be produced.

Caustic soda flakes should be stored under dry and cold spaces well-ventilated in order to avoid dust forming and spreading.   Never store caustic soda flakes together with other group of materials such as: acids and ammonium salts.

Health effects:

Please refer to the product Material Safety Data Sheet (MSDS) offering customers help to better         satisfy their particular handling, safety and disposal needs and those that may be required by locally applicable health and safety regulations.


Additional Safety Information:

Caustic soda flakes is highly corrosive hazardous product. Avoid body contact. It is dangerous to eyes and skin. Destroys skin tissues and causes severe chemical burns. Inhalation of dust/mist can cause serious injury to respiratory tract. Ingestion can injure the digestive system.









Material Safety Data sheet


1. Identification          
Product identifier      
Other means of identification Sodium Hydroxide Flakes
Product code   1310-73-2  
Recommended use    
  Laboratory chemicals, Industrial &for professional use only
Recommended restrictions  
          For industrial use only.
Manufacturer/Importer/Supplier/Distributor information
Company name TIDY Company
Address IRAN
Telephone +982188191753  
2. Hazard(s) identification        
Classification of the substance or      
Classification according to Regulation Corrosive to metals (Category 1), H290 Skin
(EC) No 1272/2008   corrosion (Category 1A), H314
          For the full text of the H-Statements mentioned
          in this Section, see Section 16.
Classification according to EU   CCorrosiveR35
Directives 67/548/EEC or 1999/45/EC For the full text of the R-phrases mentioned in
          this Section, see Section 16.
          Label elements
Labelling according Regulation (EC)      
No 1272/2008   Pictogram










Signal word                                                           Danger










Hazard statement(S) May be corrosive to metals.    
H290 Causes severe skin burns and eye damage  
Precautionary statement(S) Wear protective gloves/ protective clothing/ eye  
P280 protection/ face protection.    
P305 + P351 +P338 IF IN EYES: Rinse cautiously with water for several  
P310 minutes. Remove contact lenses, if present and  
Supplemental Hazard easy to do. Continue rinsing. Immediately call a  
Statements POISON CENTER or doctor/ physician.  
Other hazards none      
3.  Composition/information on ingredients        
Molecular Weight 40 g/mol      
CAS-No 1310-73-2          
EC-No 215-185-5          
Index-No 011-002-00-6          
Hazardous ingredients according to Regulation (EC) No 1272/2008    
Component       Classification Concentration  
Sodium hydroxide            
CAS-No 1310-73-2     Met. Corr. 1; <= 100 %  
        Skin Corr. 1A    
EC-No 215-185-5     H290, H314    
Index-No. 011-002-00-6        
Registration number 01-2119457892-27-        
Hazardous ingredients according to Directive 1999/45/EC      
Component       Classification Concentration  
Sodium hydroxide            
CAS-No 1310-73-2   C, R35 <= 100 %  
EC-No 215-185-5   H290, H314    
Index-No. 011-002-00-6        
Registration number 01-2119457892-27-        


For the full text of the H-Statements and R-Phrases mentioned in this Section, see Section 16










  1. First-aid measures



Description of first

aid measures


General advice     Consult a physician. Show this safety data sheet to the doctor in
Eye contact     attendance
If inhaled     If breathed in, move person into fresh air. If not breathing, give
      artificial respiration. Consult a physician.
In case of skin contact Take off contaminated clothing and shoes immediately. Wash off
      with soap and plenty of water. Consult a physician.
In case of eye contact Rinse thoroughly with plenty of water for at least 15 minutes and
      consult a physician.
If swallowed     Do NOT induce vomiting. Never give anything by mouth to an
      unconscious person. Rinse mouth with water. Consult a physician.
Most important symptoms and The most important known symptoms and effects are described in
effects, both acute and delayed the labelling (see section 2.2) and/or in section 11
Indication  of  any immediate no data available
medical  attention and  special    
treatment needed        
5.  Fire-fighting measures      
Extinguishing media Suitable    
extinguishing media     Use water spray, alcohol-resistant foam, dry chemical or carbon
Special hazards arising from Sodium oxides
the substance or mixture    
Advice for firefighters Wear  self  contained  breathing  apparatus  for  fire fighting  if
Further information     no data available











6. Accidental release measures      
Personal precautions, protective Wear respiratory protection. Avoid dust formation. Avoid breathing
equipment and emergency vapours, mist or gas. Ensure  adequate  ventilation.  Evacuate
procedures personnel to safe areas. Avoid breathing dust.
      For personal protection see section 8.
Methods and materials for Pick up and arrange disposal without creating dust. Sweep up and
containment and cleaning up shovel. Keep in suitable, closed containers for disposal
Reference to other sections For disposal see section 13
Environmental precautions Prevent further leakage or spillage if safe to do so. Do not let
      product enter drains. Discharge into the environment must be
7. Handling and storage        
Precautions for safe handling Avoid formation of dust and aerosols.
      Provide appropriate exhaust ventilation at places where dust is
      formed. For precautions see section 2.2



Conditions for safe storage, including any incompatibilities Specific end use(s)

Store in cool place. Keep container tightly closed in a dry and well-ventilated place


Apart from the uses mentioned in section 1.2 no other specific uses are stipulated




  1. Exposure controls/personal protection


Control parameters                               Components with workplace control parameters


Exposure controls                                  Handle in accordance with good industrial hygiene and safety

Appropriate                                            practice. Wash hands before breaks and at the end of workday

engineering controls


Personal protective equipment         Face shield and safety glasses Use equipment for eye protection

Eye/face protection                               tested and approved under appropriate government standards

such as NIOSH (US) or EN 166(EU).


Skin protection                                       Handle with gloves. Gloves must be inspected prior to use. Use

proper glove removal technique (without touching glove’s outer

surface) to avoid skin contact with this product. Dispose of


contaminated gloves after use in accordance with applicable laws

and good laboratory practices. Wash and dry hands.











Body Protection




Respiratory protection












Control of environmental exposure








Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.



Where risk assessment shows air-purifying respirators are appropriate use a full-face particle respirator type N100 (US) or type P3 (EN 143) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator. Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).



Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided.




  1. Physical and chemical properties


Information on basic physical and chemical properties

Appearance                                              Form: flakes

Colour: white


Odor                                                           Odorless

Odor threshold                                       no data available

pH                                                                14 at 50 g/l at 20 °C

Melting point/freezing                         318 °C



Initial boiling point and                        1.390 °C


boiling range

Flash point                                                Not applicable

Evaporation rate                                     no data available

Flammability (solid, gas)                      no data available

Upper/lower                                            no data available


lammability or


explosive limits

Vapour pressure                                     < 24,00 hPa at 20 °C

Partition coefficient: n                          4,00 hPa at 37 °C



no data available





no data available














Explosive properties


Oxidizing properties


Other safety information

Bulk density

Relative vapour density




  1. Stability and reactivity




Chemical stability


Possibility of hazardous reactions


Conditions to avoid



Incompatible materials Hazardous decomposition products


  1. Toxicological information









no data available



no data available

no data available


no data available



ca.1.150 kg/m3

1,38 – (Air = 1.0)




no data available


Stable under recommended storage conditions.


no data available.


no data available.



Strong oxidizing agents, Strong acids, Organic materials In the event of fire: see section 5



Information on toxicological effects Acute

toxicity                                                  no data available

Skin corrosion/irritation                 Skin – rabbit


Result: Causes severe burns. – 24 h

Respiratory or skin


Will not occur

Germ cell mutagenicity                   no data available


No component of this product present at levels greater than or

Carcinogenicity                                   equal to 0.1% is identified as probable, possible or confirmed

IARC                                                       human carcinogen by IARC


Reproductive toxicity                       no data available


Specific target organ toxicity –       no data available


single exposure


Specific target organ toxicity –       no data available

repeated exposure










Aspiration hazard                              RTECS: no data available

Additional Information


Material is extremely

destructive to tissue of the


mucous membranes and upper


respiratory tract, eyes, and




  1. Transport information



Toxicity to fish


Toxicity to daphnia and other aquatic invertebrates


Persistence and degradability


Bioaccumulative potential Mobility in soil


Results of PBT and vPvB assessment

Other adverse effects



  1. Disposal considerations




LC50 – Gambusia affinis (Mosquito fish) – 125 mg/l – 96 h LC50 – Oncorhynchus mykiss (rainbow trout) – 45,4 mg/l – 96 h


Immobilization EC50 – Daphnia – 40,38 mg/l – 48 h



The methods for determining the biological degradability are not applicable to inorganic substances


no data available


no data available


PBT/vPvB assessment not available as chemical safety assessment not required/not conducted


Harmful to aquatic life



Waste treatmen Offer surplus and non-recyclable solutions to a licensed disposal
t methods Product company. Dissolve or mix the material with a combustible solvent
    and burn in a chemical incinerator equipped with an afterburner
Contaminated packaging and scrubber
    Dispose of as unused product
14. Other information, including date of preparation or last revision  
UN number      
ADR/RID: 1823 IMDG: 1823 IATA: 1823
UN proper shipping name    
IATA: Sodium hydroxide, solid
Transport hazard class(es)    
Packaging group      










ADR/RID: II            IMDG: II                            IATA: II

Environmental hazards

ADR/RID: no           IMDG Marine pollutant: no IATA: no

Special precautions for user

no data available


  1. Regulatory information


This safety datasheet complies with the requirements of Regulation (EC) No. 1907/2006


Safety, health and environmental


regulations/legislation specific for no data available


the substance or mixture



Chemical Safety Assessment

For this product a chemical


safety assessment was not carried out



  1. Other information


Full text of H-Statements referred to under sections 2 and 3.

H290                                                                 May be corrosive to metals.


H314                                                                 Causes severe skin burns and eye damage.

Met. Corr.                                                       Corrosive to metals

Skin Corr.                                                        Skin corrosion

Full text of R-phrases referred to under sections 2 and 3

C                                                                       Corrosive


R35                                                                  Causes severe burns.

Further information                                   The above information is believed to be correct but does not


purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. Central Drug House (P) Ltd and its Affiliates shall not be held liable for any damage resulting from handling or from contact with the above product. See for additional terms and conditions of sale.