Collectively adsorption cotton, according to the intended use can be divided into three categories: the oil-absorbing cotton, cotton aspiration, absorption of cotton; Recognition from Color namely: white for absorbing cotton; gray cotton for aspiration; yellow cotton absorbs harmful chemicals. Absorbents: can absorb all the oil, does not absorb water and aqueous solvents. Pipette Cotton: can absorb all general oil, water and aqueous solutions and all other liquids. Absorbing cotton: mainly for chemical hazard category and unknown liquids pH, but also can absorb oil and other liquid water, solvents.