A general histological stain. High Purity Grade EM (550nm, 0.1M NaOH) >14,700

Stain for proteins and total carbohydrates in plants. High Purity Grade EM (615nm, H₂O)> 28,500

A metachromatic stain of cytoplasm and nuclei. High Purity Grade Solubility test: Passes EM (543nm, 50% methanol): 86,900 Dye content >88% A550 >0.65 Staining, leilson procedure: Passes

A cytological counterstain used for general plant histology. High Purity Grade EM (630nm, water) >63,500

Used as a pH indicator. ACS Grade 3,3'-Dibromothymolsulphonephthalein Visual transition interval pH 6.0-7.6

Higth Purity Grade A metachromatic stain for histology. EM (626nm, water) >45,000 Moisture <5.0%