Sodium Naphthalene Formaldehyde(SNF)

Sodium Naphthalene Formaldehyde ( water reducing agent)

Sodium naphthalene Formaldehyde(SNF) is anionic surfactants are a series of sodium salts of alkyl naphthalene sulfonic acid formaldehyde condensate.As a low molecular weight dispersant with moderate levels of sodium sulfate; it is especially useful in dispersions having low solids content. It is commonly used as dispersant, filler, leather tanning agent, building cement concrete water reducing agent, oil well cement water reducing agent .It’s often referred to as PNS or NSF or SNF.

Cas No:36290-04-7




Model itemSNF-10%
net starch fluidity ( ㎜ )≥ 220
content of c l — (%)< 0.4
PH value7 ~ 9
surface tension(N/m)(7 1 ± 1) × 10 -3
solids content(%)≥ 91
Na 2 SO 4 content(%)<5

Technical Feature

  1.   The water reducing agent (SNF)can reduce the water consumption without affecting the normal construction of cement concrete, In the hardening process of cement concrete,there is less water to be lost,so there are fewer internal air holes in the concrete, which increases the strength of the concrete.
  2. The water-reducing agent(SNF) can improve the workability of cement concrete and reduce the energy consumption of construction mixing.
  3. The water-reducing agent(SNF) can reduce the amount of cement and water without reducing the performance and mechanical index of cement concrete, thus reducing the construction cost.
  4.  The water-reducing agent(SNF) is no adverse effect on concrete shrinkage and no corrosion effect on steel reinforcement.

Test Date Sheet

Items CriteriaActual Results
Water Reduction, %≥ 1417
Water Penetration, %≤ 9080 
Air Content, %≤ 3.02.0 
Compression strength, %1h≥ 140165
3h≥ 130155
7h≥ 125 135
28h≥ 120130
Shrinkage, %               28d≤ 135 87


1.Blending dosage at 0.5%-1.0%, 0.75% mixing dosage advised.

2.Prepare solutions as required.

Package and Storage

1.Package:Powder products use woven bags. net weight: 25kg ± 0.2 kg or 650 kg ± 0.2 kg or 700 kg ± 0.2 kg .

2.It should be stored in a dedicated warehouse that is well-ventilated and dry.if be affected with damp,just smash or melt it into solution without any bad effection.


prevented from being torn by sharp-ended objects while packages are being transferred or delivered. when being contaminated by high humidity or moisture in case of leakage, it can be prepared in prescribed ways for further use without surrendering any effect.