Sodium Naphthalene Formaldehyde produces concrete with extremely workable characteristics referred to as high slump. PNS also allows concrete to be produced with very low water/cement ratios at low or normal slumps. 
Sodium Naphthalene Formaldehyde is ideal for use in prestress, precast, bridge deck or any concrete where it is desired to keep the water/cement ratio to a minimum and still achieve the degree of workability necessary to provide easy placement and consolidation
Sodium Naphthalene Formaldehyde Specification: 
Solid Content 92% min 
Moisture 8.0 % max 
Fineness 5.0% max 
PH value 7 - 9 
Chlorides Content 2.0% max 
Surface Tension 68-72 Mn/m 
Cement Flowing Rate 230mm min 
Concrete Reducing Water Rate 18% min 
Sodium Sulfate Content 18% max (5%max is also available) 

Addition Rates 
Sodium Naphthalene Formaldehyde can be added directly or added in after melt. It can be added during mixing and after-mixing. The afterward approach can achieve better result. The suggested addition rate is 0.75%. 
Sodium Naphthalene Formaldehyde Direction 
Prepare solutions as required. 
Direct use of powdery agent is allowed. Alternatively the addition of the agent is followed by water moisturization (water-cement ratio: 60%). 
The agent can be combined with other externally applied agents if pilot development or laboratory experiment succeeds. 
Sodium Naphthalene Formaldehyde Package, Storage & Handling 
For powder: Woven fabric bag with plastic liner. Net weight: 25kg 0.1 kg.