Dense soda ash is an important industrial chemical used in the glass, silicate, detergent, and other industries. Dense soda ash is mainly sodium carbonate with two water molecules and is produced by densification and crystallisation of light ash. Its density is almost double that of light ash. Dense soda ash dissolves readily in hard and soft water. Dense soda ash is an important industrial chemical used in the glass, silicate, detergent, and other industries.