Methyl Red Indicator – Pink to Yellow, Concentration 0.1 Percent, CAS Number 7732-18-5, 845-10-3, Chemical Formula C15H15N3O2, APHA 4500-SO42 C,D, Chemical Container Material Plastic, Chemical Container Type Bottle, Chemical Grade Lab, Chemical Container Size 125 mL, Chemical Family Type Solution, Standard, Shelf Life 24 mo, Shipping Restrictions Chemical Not Regulated For Transport, Standards APHA 4500-SO4�� C,D, ASTM 1067-11 B, Special Information pH 4.2 to 6.3 Pink to Yellow