10 minutes. The main purpose is to identify warts, evenly applied to the surface of the bumps on the surface, about ten minutes to observe, do the acetic acid white test does not necessarily white are warts, back to non-white may also be warts, sometimes need to use a magnifying glass.
There is also no certainty that there is no special ingredient in white vinegar that will make the experiment fail, so if possible, you must use acetic acid to do the experiment, never use white vinegar casually, and the supplies should also be carefully selected.
After purging the skin lesions with cotton swabs to reward secretions, a cotton swab dipped in 5% glacial acetic acid liquid coated in the tested skin lesions and the surrounding normal skin and mucous membranes positive reaction for 2-5 minutes after the skin lesions become white, while the surrounding normal skin does not change the white, seen in the condyloma acuminatum.
Expanded information:
Harmfulness of acetic acid whitening test:
Mutagenicity: microorganisms mutagenic: E. coli 300 ppm (3 h). Sister chromatid exchange: human lymphocytes 5 mmol/L.
Reproductive toxicity: lowest toxic dose (TDL0) in rats orally: 700 mg/kg (18 d, postnatal), with effects on neonatal behavior. The lowest intratesticular toxicity dose (TDL0) in rats: 400 mg/kg (1 d, male), had effects on male fertility indices.
Health hazards: The routes of invasion are inhalation, ingestion, and percutaneous absorption. Inhalation is irritating to nose, throat and respiratory tract. Strong eye irritation. Skin contact, mild erythema, severe chemical burns. Accidental ingestion of concentrated acetic acid can produce erosion of the oral cavity and digestive tract, and in severe cases, death may result from shock.
Chronic effects: eyelid edema, conjunctival congestion, chronic pharyngitis and bronchitis. Repeated exposure over a long period of time can lead to dry skin, desquamation and dermatitis.
Environmental hazards: harmful to the environment, can cause pollution of water bodies.
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