What’s in the tube (from the first link above):

Glycerine

Emollient

Can cause skin dryness over time and this in turn can make it more prone to absorbing harmful chemcials. Glycerine has been shown to be toxic to sperm and it is also a sugar, so can feed Candida albicans.Should be avoided by women prone to thrush.

Hydroxyethylcellulose

Emollient

A cellulose derivative also often found in dry-eye medications. No known toxic effect; however, this ingredient is poorly studied.

Gluconolactone

Antimicrobial, controls pH

Harsh alpha hydroxyl acid often used in the treatment of acne. Can irritate skin and eyes.

Chlorhexidine digluconate

Antiseptic

Often found as the active ingredient in mouthwashes designed to kill dental plaque. Mildly toxic by ingestion; also a skin and eye irritant. Laboratory evidence suggests that it may cause cellular mutations.

Methylparaben

Preservative

Parabens are known to be oestrogenic and exposure has been associated with the proliferation of breast cancer cells in the lab. Irritating to skin and may cause contact allergies.

Sodium hydroxide

Preservative, controls pH

Can cause irritation to the skin and (if it comes into contact with them) eyes.