When considering if a lotion is safe for use on a 16-month-old baby, key points to cover include:

• Ingredients: It's important to check if the lotion contains any harsh chemicals, fragrances, or allergens that might irritate a baby's sensitive skin.

• Purpose of the lotion: Whether it's a moisturizer, medicated cream, or sunscreen, each has different safety profiles for infants.

• Consulting a pediatrician: Before using any new product on a baby, especially under 2 years, it's best to get advice from a pediatrician.

• Patch testing: Trying a small amount on a limited skin area to watch for any adverse reactions before full use.

• General safety tips: Using products specifically formulated for babies is usually safer.

If you can provide the name or ingredients of the lotion, I can offer more specific guidance. Meanwhile, I recommend discussing this with a pediatrician to ensure the lotion is appropriate and safe for your child.