Schedule – XV

Handling or manipulation of corrosive substances


1.         Definitions - For the  purposes of this schedule -

(a)                 “corrosive  operation”  means  an  operation  of  manufacturing, storing,  handling processing, packing, or using any  corrosive substance in a factory; and


(b)                 “corrosive  substance” includes sulphuric acid,  nitric  acid, hydrochloric acid, hydrofluoric acid, carbolic acid, phosphoric acid, liquid chlorine, liquid bromine, ammonia, sodium hydroxide and  potassium hydroxide and a mixture thereof, and any other substance  which the State Government  by  notification in the Official Gazette specify to be corrosive  substance.


2.         Flooring -  The floor of every workroom  of a factory  in  which corrosive  operation  is  carried on shall be  made of  impervious, corrosion and fire resistance material and shall be so constructed as to prevent collection of any corrosive substance. The surface of such flooring shall be smooth and cleaned as often as necessary and  maintained in a sound condition.


3.         Protective equipment- (1) The occupier shall provide for the use of all persons employed in any corrosive operation suitable protective wear for hands and feet, suitable aprons, face shields, chemical  safety  goggles, and  respirators.  The equipment shall be maintained  in  good order and  shall be kept in clean and hygienic condition by suitably treating to get rid of the ill effects of any  absorbed chemicals and by disinfecting. The occupier  shall also  provide  suitable protective  creams  and other  preparations   wherever necessary.


(2)   The Protective equipment and preparations provided shall be  used by the persons employed in any corrosive operation.


4.         Water  facilities -  Where any corrosive operation is carried  on, there shall be provided as close to the place of such operation as possible, a source of clean water at a height of 210 centimetres from a pipe of 1.25 centimetres  diameter and fitted with a  quick acting valve  so  that  in case of injury to  the worker by any corrosive substance, the injured part can be thoroughly flooded with water. Whenever necessary, in order to ensure continuous water supply, a storage tank having a minimum length, breadth and height of 210 centimetres, 120 centimetres and 60 centimetres respectively or such dimensions as are approved by the chief  inspector  shall provided  as the source of clean water.


5.         Cautionary notice - A cautionary notice in the following form and printed in the language which majority of the workers employed understand, shall be displayed  prominently close to the place where a corrosive  operation is carried out and where it can be easily  and  conveniently read by the workers.  If any worker is illiterate, effective steps shall be taken  to explain carefully to him the contents of the notice so displayed.







Corrosive substances cause severe burns and vapours thereof may be extremely hazardous.  In case of contact, immediately flood the part affected  with plenty of water for at least 15 minutes.


Get medical attention quickly.




 6.        Transport - (1) Corrosive  substances shall not be filled,  moved or carried  except  in containers or through pipes and when they are to be transported   in containers, they shall be placed in  crates  of sound construction and of sufficient strength.


(2)               A  container with  a capacity of 11.5  litres or  more  of a  corrosive substance shall be  placed in a receptacle  or  crate and then carried  by  more than one person at a height below the waist line unless a suitable rubber wheeled truck is  used  for the purpose.


(3)               Containers for corrosive substances shall be plainly labelled.



7.         Devices for handling corrosive - (1) Tilting, lifting of pumping arrangements shall be used for emptying jars, carboys and other containers of corrosives.


(2)        Corrosive  substance shall not be handled by bare hands  but  by means of a suitable scoop or other device.


8.         Opening of valves -  Valves fitted to containers  holding a corrosive substance shall be opened with great care.  If they do not work freely, they shall not be forced open.  They shall be opened by a worker suitably trained for the  purpose.


9.         Cleaning   tanks,  stills,  etc. - (1) In cleaning out or removing residues from stills or other large chambers used for holding any corrosive substance, suitable implements  made of wood or other material shall  be  used  to prevent production of arseniuretted hydrogen (arsine).

(2)               Whenever it is necessary for the purpose of cleaning or other maintenance work for any worker to enter chamber, tank, vat, pit or other confined space where a corrosive substance  had been stored,  all possible  precautions  required  under  section  36  of the  Act shall be taken to ensure  the  worker’s safety.


(3)               Wherever possible, before repairs are undertaken to any part of equipment in which a  corrosive substance was handled, such equipment or part thereof shall be freed of any   adhering corrosive substance by adopting  suitable methods.


10.       Storage - (1) Corrosive substances shall not be stored  in the same room  with other chemicals, such as turpentine, carbides, metallic powders and combustible materials, the accidental mixing with which  may cause a reaction which is either violent or gives rise to  toxic fumes and gases.


(2)                Pumping or filling overhead tanks, receptacles, vats or other containers for storing corrosive substances shall be so arranged that there is no possibility of any corrosive substance   overflowing  and causing  injury  to any person.


(3)                Every container having a capacity  of twenty litres or more and every pipeline, valve, and fitting used for storing or carrying corrosive substances shall be thoroughly examined every year  for finding out any defects, and defects so found  out shall  be removed  forthwith.   A register shall be maintained of every such examination made and shall be produced before the Inspector whenever required.


11.       Fire extinguishers and fire fighting equipment - An adequate number of suitable type of fire extinguishers or other stored, shall be provided. Such extinguishers or other equipment shall be  regularly tested and refilled. Clear instructions as to how the extinguishers or other equipment should be used, printed in the language which majority of the workers employed understand, shall be affixed  near each extinguisher or other equipment.


12.       Exemption - If  in respect of any factory on application made by   the  manager,  the Chief Inspector is satisfied that owing to  the exceptional circumstances, or the infrequency of the process or for  any other reason to be recorded by him in writing, all or any of the provisions of this schedule are not necessary for the protection of the persons employed therein, he may by a certificate in  writing,   which he may at any time revoke, exempt the factory from  such of the provisions and subject  to such conditions as  he  may  specify therein