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Crack-free Strong Base Anion Exchange Resin Type I- Nuclear Grade

Tulsimer ® A-33 OH is a specially developed, premium grade, strongly basic anion exchange resin based on polystyrene matrix containing quaternary ammonium Type I groups with excellent physical and chemical stability for use in the nuclear industry. Tulsimer ® A-33 OH is regenerated in hydroxide form ensuring that not more than 3% of exchange sites are in chloride form.

Tulsimer ® A-33 OH is primarily used for purification of reactor coolant water and moderator in nuclear power station plants to keep corrosion products to the minimum and thus protecting the heat transfer surfaces from scaling and corrosion.

Tulsimer ® A-33 OH has excellent capacity for removal of boric acid. Tulsimer ® A-33 OH is manufactured under the most stringent quality controls to ensure minimal metallic impurities resulting in the highest purity of the ionic form supplied.




Strong base anion exchange resin

Matrix structure

Polystyrene copolymer

Functional group

Quaternary Ammonium Type I

Physical form

Moist Powder form

Ionic form


Screen size US  mesh

16 to 50

Particle size (minm. 95%)

1.2 to 0.3mm

Uniformity coefficient

1.75 max

Backwash settled density

42 to 44 lbs/ft3 (670 to 710 g/l)

Bead strength

Not less than 250g/bead average by Chatillion Test

Swelling (approx.)

Cl-to OH- 20%

Moisture contents (approx )

70 ± 3 %

Thermal stability

80 °C

pH range

0 to 14


Insoluble in all common solvents

Total exchange capacity

1.0 meq/gm(minm.90% of its exchange sites in hydroxide form and a max. of 3% in chloride form)





The sampling and testing of ion exchange resins is done as per standard testing procedures, namely
ASTMD-2187 and IS-7330, 1998.


Super sacks

1000 liters

Super sacks

 35 cft

 MS drums

180  liters

Fiber drums

7 cft

HDPE lined bags

25    liters

 HDPE lined bags

1 cft


For Handling, Safety and Storage requirements please refer to the individual Material Safety Data Sheets available at our offices. The data included herein are based on test information obtained by Thermax Limited. These data are believed to be reliable, but do not imply any warranty or performance guarantee. Tolerances for characteristics are as per BIS/ASTM. We recommend that the user should determine the performance of the product by testing on own processing equipment.