Colloidal Silver (9007-35-6)

Silver Molecular Structure

What is Colloidal Silver?

Colloidal silver is a suspension of tiny silver particles in a medium. The silver particles in colloidal silver are typically in the nanometer size range, ranging from 1 to 100 nanometers in diameter. The term “colloidal” refers to the fact that the silver particles do not dissolve but remain suspended in the medium.

The product is currently under development. Samples are available from R&D.
Name of Product Colloidal Silver
Synonyms Cargol; Nanosilver; Argentum metallicum; Silver colloidal; Silver nanoparticles
CAS No 9007-35-6
Molecular Formula Ag
Molecular Weight 468.633 g/mol

Chemical Properties

SR. No Criteria Limit/Specification
1 Appearance (Form) Granulated Powder
2 Appearance (Color) Green or black-blue brilliant flakes
3 Solubility Insoluble in alcohol and ether
Freely soluble in water
4 Silver Content 70-80%
5 Total Aerobic Mesophilic Count < 1.000 UFC/g


  • Colloidal silver has been marketed as having antibacterial and antimicrobial properties. It is used topically in creams to treat skin conditions such as dry and chapped skin, dermatitis, sun-damaged skin, cracked heels eczema, and acne.
  • It was used to treat wounds and infections, prior to the development of antibiotics.
  • Some studies have assessed the efficacy of colloidal silver nasal spray in the treatment of persistent sinus infections.
  • Colloidal silver is often promoted as a dietary supplement that boosts the immune system. However, there is a lack of scientific evidence to support its effectiveness in this regard.

Side Effects

Some of the side effects associated with the use of Colloidal silver are-

  • Headache
  • Fatigue
  • Myoclonic seizures
  • Impaired liver and kidney function
  • Argyria – A¬†gradual accumulation of silver in the tissues of the body, resulting in a permanent bluish-gray discoloration of the skin’s surface.


Q. Is colloidal silver safe?

While silver is generally considered safe in certain forms and at low concentrations, colloidal silver poses specific risks that warrant caution, such as prolonged or excessive consumption of colloidal silver can lead to a condition called argyria. Also, in rare cases, too many doses can cause long-lasting severe health problems, such as kidney damage and seizures. It can also interact with certain medications such as some antibiotics and levothyroxine.

Q. What is colloidal silver good for?

As a topical treatment for skin infections and wounds, as well as for the treatment of burns, colloidal silver is approved for use in bandages and dressings.

Q. Can you put colloidal silver in your eye?

When it comes to eye care, it’s best to use products that are specifically formulated for eyes and approved by healthcare professionals. Colloidal silver is not formulated or tested for use in the eyes. Thus, kindly consult with an eye care professional or healthcare provider.

Q. Does colloidal silver kill fungus?

Although test-tube investigations have demonstrated the efficacy of colloidal silver in eradicating various bacteria, fungi, and viruses, human studies have yet to validate this claim owing to the inherent dangers associated with its ingestion.

Q. Is colloidal silver safe for dogs?

It is particularly detrimental to administer colloidal silver orally to a dog. Gut dysbiosis, organ damage, and developmental issues are all highly probable complications.

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