Effects of storage conditions, formulation, and particle size on moisture sorption and flowability of powders: A study of deliquescent ingredient blends

► Formulation and storage RH affect the flowability of deliquescent powders. ► Blends are generally less flowable than single ingredients. ► Larger particles are more flowable and sorb less moisture than smaller particles. ► Powders become less flowable over time. ► Storage at RHs well below the deliquescence RH is important.