SARAWHITE(CONC). | OBA with Neutral Tone

Product Information

Sarawhite (Conc).is a high affinity optical brightener for cellulosic fibres and their blends. It can also be applied for wool, silk and nylon. Due to it's high affinity, Sarawhite (Conc).is recommended by exhaust application only. Sarawhite (Conc).is stable to peroxide as well as reductive bleach liquors hence, combined bleaching and optical brightening can be carried out.

Key Features & Benefits
Key Features Benefits
Neutral white
Required tone easily adjusted
Concentrated form
Lower dosage required and economical
High affinity
Excellent exhaustion
Good stability to peroxide and reducing agent
Combined bleaching and optical brightening possible
General Characteristics
Physical appearance
Greenish yellow powder
Ionic nature Anionic
pH of 1% solution 10 +/- 1
Miscibility Miscible with water
Stability Stable to dilute acids and dilute alkalies
Compatibility Compatible with anionic and nonionic products

Exhaust process

Cotton :

  • Dosage* : 0.1-0.15%
  • Bath pH : 6-12
  • Bath Temp. : 60-110 deg.C, 20-30 mins.

Viscose & Modal:

  • Dosage* : 0.1-0.15%
  • Glauber's salt : 3-5 g/l
  • Bath Temp. : 60-80 deg.C, 20-30 mins.

Wool, Silk & Nylon

  • Dosage* : 0.1-0.15%
  • Sodium hydrosulphite : 2-4 g/l
  • Bath Temp. : 50 deg.C, 45-60 mins.

*Dosages recommended are based on the concentrated product's strength.

Dosages of diluted product to be calculated on the basis of solid content.


Peroxide bleach
Reduction bleach (hydrosulphite based)
Chlorite bleach
Chlorine bleach
Hard water, ppm (Ca)
Fastness properties
Change in degree of whiteness
ISO 105-B02
3 - 4
Wash fastness,60 deg.C
ISO 105-C06 C1
Wash fastness,90 deg.C
ISO 105-C06 E1
Dry heat fixation,180 deg.C
ISO 105-P01
Dry heat fixation,210 deg.C
ISO 105-P01
Perspiration, acidic
ISO 105-E04
Perspiration, alkaline
ISO 105-E04
Dry cleaning
Chlorine bleach
Chlorite bleach

Instructions For Dilution

Procedure to prepare 10% diluted product of 100% Sarawhite (Conc).

  • Take 77.5 parts of water (60 deg.C)
  • To this, add 12.5 parts of urea with constant stirring 
  • Then slowly add 10 parts of Sarawhite (Conc).with constant stirring
  • Continue stirring till Sarawhite (Conc).is completely dissolved
  • Maintain temperature (i.e. 60 deg.C) during stirring

Preservation: It is recommended to add 0.1% Bronopol (2-Bromo, 2-nitropropane, 1,3-diol) or Methyl Paraben (methyl para hydroxy benzoate) as an antimicrobial agent to avoid fungal / microbial growth. 


pH of diluted solution should be between 9-10 and if not, adjust with caustic.

Un-dissolved particles if any can be filtered off.

It is advisable to utilize the diluted product within seven days.

Stir well before use.



Storage : Store in cool, ventilated shed away from heat and direct sunlight. Storage temperature should not exceed 35 deg C.Close lids firmly to avoid contact with air and moisture.

Shelf Life : 9 months from the date of manufacturing, if stored under controlled conditions.

The above information is given in good faith and is without warranty

Related Products

Product Name Short Description Description
CAREWHITE-BBU 250%. OBA with Bluer tone

A low affinity optical brightening agent with bluer tone for Cellulosic fibres and their blends.

SARAWHITE-COL. OBA with Bluer tone

A high-affinity optical brightener with bluish tone for cellulosic fibres and their blends.

Sarawhite-MST. OBA with Bluer tone

A high-affinity optical brightener in powder form imparting bluer tone on cellulosic fibre and its blends. It is suitable for exhaust application.