Methyl Orange Indicator, Concentration 0.05 Percent, CAS Number 547-58-0, 7732-18-5, Chemical Formula C14H14N3NaO3S, APHA 5530 B, 4500-P B, 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 5530 B, 4500-P B, ASTM D1067-11 B, Special Information pH 3.2 to 4.4 Red to Yellow