Concrete Admixtures
Concrete Protection Materials Concrete Repair Materials Flooring Materials Grouting & Anchoring Materials Waterproofing and Joint Sealants Dry-mixed Mortar Materials Exterior Insulation Finishing
MUHU (China) Construction Materials Co., Ltd.
Your current location:Home > Products > Concrete Admixtures
Naphthalene Sulfonate Formaldehyde (SNF)
Product Name: Naphthalene Sulfonate Formaldehyde (SNF)
Type: UNF-5 / FDN
Package: 25kg / bag , 700 kg / bulk bag

Naphthalene Sulfonate Formaldehyde (SNF/NSF/PNS) 


Naphthalene Sulfonate Formaldehyde (NSF) is a naphthalene-based superplasticizer, also named Naphthalene Sulfonate Formaldehyde Condensate (SNF) and Poly Naphthalene Sulfonate (PNS) etc. It is a high range water reducer, commonly referred to as superplasticizer. It is a chloride free product that is supplied as a brown powder to be instantly dissolved in water. It is used to effect substantial water reduction to concrete without influencing normal setting time.

 Standards Compliance

Naphthalene Sulfonate Formaldehyde (SNF/NSF /PNS) complies with the requirements of the following standards: ASTM C 494, Type F; ASTM C 1017.

 Typical Properties






Light Brown Powder

Dark brown Powder

Specific Gravity



Sodium Sulfate Content, %

18.0 max

5.0 max.

pH value


7 -9

Solid Content, %

92 min

92 min

Moisture, %



Fineness (0.315mm remains), % 




To provide initial workability especially with low water cement ratio.

To significantly improve the initial workability of site mixed concrete without increasing water demand.

To provide improved durability by increasing ultimate strengths and reducing concrete permeability.

To have high slump retention with early setting time.

 Typical Applications & Advantages

■ Powerful plasticizing action with improved initial workability.

■ Reduces water cement ratio to the maximum which allows production of high strength concrete while saving cement use.

■ Improved cohesion and particle dispersion minimizes segregation and bleeding and improves pumpability.

■ Long haul and hot weather concreting.

■ Gains early strength with very high slump retention.

Technical Support and Services

MUHU offers one-stop type services and turn-key projects.
Our cost estimation is based on the assumption of producing 100 to 120 tons per day of liquid product at the concentration of 40% and the drying capacity for powder product can be 2 tons per hour.

MUHU is well known in admixture manufacturing, researching, and developing. We have excellent professional technical team, providing our customers with on-site instruction on concrete admixture compounding techniques. Meanwhile, we also provide long-term training on admixture compounding techniques. In order to ensure customers feel worry free, we supply our customers who have purchased our equipment with various technical supports, including training on admixture compounding techniques, know-how transfer, and technical cooperation, etc. 

  Liquid product line design

 Instructions for Use:

■ Compatibility 

Naphthalene Sulfonate Formaldehyde (SNF/ NSF /PNS) can be used for all types of Portland cement and for use with any other special cements contact MUHU.

■ Dosage
The optimum dosage of Naphthalene Sulfonate Formaldehyde (SNF/ NSF /PNS) to meet specific requirements should always be determined by trials using the materials and conditions that will be experienced in use.





 Normal dosage ranges

0.5 to 1.0 kgs/100 kg of cementitious material

0.4 to 1.0 kgs/100 kg of cementitious material

Dosages outside the normal range quoted above can be used to meet particular mix requirements. Contact MUHU for advice in these cases.

Naphthalene Sulfonate Formaldehyde (SNF/ NSF /PNS) affords excellent control over initial and final setting times. Setting times of concrete mixes are related to cement type, mix design and ambient temperature.

■ Packaging & Storage
It’s packed in woven fabric bag with plastic liner. Net weight: 25kg.

Naphthalene Sulfonate Formaldehyde (SNF/ NSF /PNS) has a minimum shelf life of 12 months provided it is stored under cover, out of direct sunlight.

 Health & Safety Precautions

Naphthalene Sulfonate Formaldehyde (SNF/ NSF /PNS) does not fall into the hazard classifications of current regulations. However, it should not be swallowed or allowed to come into contact with skin and eyes. Suitable protective gloves and goggles should be worn. Splashes on the skin should be removed with water. In case of contact with eyes rinse immediately with plenty of water and seek medical advice. If swallowed seek medical attention immediately and not induce vomiting.
For further information, refer the Material Safety Data Sheet available for this product.

 Important note
MUHU endeavors to ensure that the technical information contained herein is true, accurate and represents our best knowledge and experience. No warranty is given or implied, as MUHU has no control over the conditions of use and the competence of any labor involved in the application.

As all MUHU technical data sheets are updated on a regular basis it is the customer’s responsibility to check that the product is suitable for the intended application, and that the actual conditions of use are in accordance with those recommended.


Copyright 2013 | MUHU (China) Construction Materials Co., Ltd. All rights reserved.