Sodium Styrenesulfonate - SPINOMAR® NaSS

SPINOMAR® NaSS (CAS 2695-37-6) 

SPINOMAR NaSS is a registered trademark for Tosoh Corporation’s patented hemihydrate form of sodium styrenesulfonate. 

This novel product form exhibits better stability, reduced polymerization in storage and reduced lumping in storage than standard grades. The hemihydrate form is covered by U.S. Patent 5,898,083 and Japan Patent JP36012222.

Sodium styrenesulfonate (NaSS) is a highly reactive vinyl monomer containing a hydrophilic sulfonate group. Significant advantages of NaSS as compared with other monomers are low toxicity and high thermal stability. NaSS is widely used to improve dyeability of acrylic and polyester fibers. Other applications include reactive emulsifiers for water-borne coatings and anti-static agents for textiles, plastics, and papers. Fields of application include water treatment, photography and paper manufacturing. 

For more information, please download and read the SPINOMAR NaSS brochure at the left.

Polystyrenesulfonate Homopolymers and Copolymers

Information on the PolyNaSS series can be viewed on the PolyNaSS Grades page »

PolyNass series presented in PDF is available for download in the box to the left.

Styrene Sulfonate Derivatives

Product Properties Specification
Sodium p-styrenesulfonate SPINOMAR® NaSS    
Sodium 4-vinylbenzenesulphonate Melting Point: 330ºC  Appearance: White Solid 
CAS Number:  2695-37-6 Boiling Point:   Purity (%): 84-92 min.
METI:  3-1903 Flash Point: - NaBr (%): 4 max.
TSCA:  Registered Density:
NaOH (%): 1 max.
EINECS:  220-266-3

Na2SO4 (%): 1 max.
Status:  C
Packing:  25kg carton box
Patents: U.S. 5,898,083 / JP 3601222
Formula:  C8H8O3S.Na
Product Properties Specification 
Sodium p-styrenesulfonate Homo-Polymer PolyNaSS
Appearance: Clear liquid

Grade     Molecular Weight (x1000) Viscosity (mPA • s, 25ºC) pH (25ºC)
CAS Number:  25704-18-1 PS-1 10-30 5-10 7-9
METI:  6-1040  PS-5  50-10 20-50 7-9
TSCA:  Registered PS-50 400-60 200-500 7-9
EINECS:  - PS-100 800-1200 800-1600 8-11
Status:  C
Packing:  20kg can / 200kg drum
Formula:  (C8H8O3S.Na)x
Product Properties Specification
Lithium p-styrenesulfonate SPINOMAR® LiSS

CAS Number:  4551-88-6 Melting Point: 325ºC  Appearance: White Solid
Boiling Point:
Purity (%): 81.0 min.
METI:  3-1948 Flash Point: -

TSCA:  Registered Density:


Status:  C
Packing:  20kg bag

Formula:  C8H8O3S.Li
Product Properties Specification
Ethyl p-styrenesulfonate EtSS    
CAS Number: 16736-98-4 Melting Point:
Appearance: Pale yellow liquid
Boiling Point: 150ºC / 0.26 k Pa Purity (%): 95 min.
METI:  - Flash Point: 73ºC

TSCA:  - Density: 1.16


Status:  D
Packing:  -

Formula:  C10H12SO3
Product Properties Specification
p-tert Butoxystyrene PTBS

tert-Butyl p-vinylphenyl ether Melting Point
Appearance Pale yellow liquid
CAS Number:  95418-58-9 Boiling Point 92ºC / 0.67 k Pa Purity (%) 84-92 min. min.
METI:  3-4138 Flash Point 126ºC Color (APHA) 100 max.
TSCA:  - Density 0.933 Acidity (as HCL)
EINECS:  -     Water Content (%) 100 max.
Status:  C
Packing:  180kg drum

Formula:  C12H16O  
Product Properties Specification
p-Acetoxystyrene PACS

Phenol, 4-ethenyl-, acetate Melting Point:
Appearance: Pale yellow liquid
CAS Number:  2638-16-2 Boiling Point: 100ºC / 0.67 k Pa Purity (%): 99.0 min.
METI:  2-2784 Flash Point: - Color (APHA): 100 max.
TSCA:  Registered Density:
Acidity (As HCl):

Water Content (%): 200 max.
Status:  C
Packing:  200kg drum

Formula:  C10H10O2
Product Properties Specification
p-(1-Ethoxyethoxy)styrene PEES    
CAS Number: 
Melting Point:
Appearance: Pale yellow liquid
Boiling Point: 87ºC / 0.13 k Pa Purity (%): 98.5 min.
METI:  3-4590 Flash Point: 120ºC Color (APHA): 100 max.
TSCA:  - Density: 0.989 Acidity (As HCl):
EINECS:  -     Water Content (%): 100 max.
Status:  C
Packing:  180kg drum

Formula:  C12H16O2