Skin contact with potassium dichromate high temperature steam, is it harmful to the body?

What harm does potassium dichromate do to human health? There are three ways that potassium dichromate does harm to human body: inhalation, ingestion and percutaneous absorption.

Health hazards: acute poisoning: inhalation can cause acute respiratory irritation, nosebleeds, hoarseness, atrophy of nasal mucosa, and sometimes asthma and alopecia. In severe cases, chemical pneumonia may occur. Oral administration will irritate and corrode the digestive tract, causing nausea, vomiting, abdominal pain, bloody stool and so on. Severe cases include dyspnea, cyanosis, shock, liver injury and acute renal failure.

Chronic effects: contact dermatitis, chrome ulcer, rhinitis, perforation of nasal septum and respiratory inflammation.

Carcinogenicity: IARC Carcinogenicity Comments: There is no evidence of carcinogenicity in animals, but there is enough evidence of carcinogenicity in humans.

Potassium dichromate orange-red triclinic crystal or acicular crystal. Potassium dichromate; Potassium sulfate, English name potassiumbibichromate；; Potassium dichromate, the structure or molecular formula is K2Cr2O7.

Relative molecular weight or atomic weight 294. 18

The relative density is 2.676(25℃).

Solubility: soluble in water, insoluble in ethanol. The solubility in water at 20℃ is 12g.

Preparation or source of potassium dichromate

It can be prepared by double decomposition of sodium dichromate with potassium chloride or potassium sulfate. Others release oxygen at incandescent temperature and are strongly oxidized.

Emergency treatment of potassium dichromate

1. When a large amount of chromic acid or chromate is inhaled, it should be quickly transferred to fresh air to keep the respiratory tract unobstructed and release oxygen.

2. When the skin comes into contact with chromic acid or chromate, wash the wound with water immediately.

3. Oral poisoning, gastric lavage, 50% magnesium sulfate 60ml catharsis, milk egg white to protect gastric mucosa.

Personal protection of potassium dichromate

1. The electroplating bath side of electroplating workshop is coated with acid mist, and acid mist inhibitor can be used in this tank.

2. A special faucet is installed in the workshop to clean skin and eyes in time.

3. Strengthen personal protection. Workers engaged in chromic acid and chromate treatment should wear gloves and wash their hands adequately. Please check whether your hands and skin are damaged before work. Apply nasal ointment for protection. Rinse the nasal cavity after work.

4. Health monitoring: once a year.

5. contraindications to employment: bronchial asthma and dermatitis.

The toxicity of potassium dichromate comes from hexavalent chromium, which belongs to swallowing poison/inhalation extreme poison, and skin contact may also cause allergies; It is more likely to cause genetic defects, and inhalation may cause cancer. Hexavalent chromium is easily absorbed by human body and can invade human body through digestion, respiratory tract, skin and mucosa. It has been reported that when the air contains different concentrations of chromic anhydride through breathing, the nasal mucosa shrinks to varying degrees, and in severe cases, the nasal septum may be perforated. Invasion through the digestive tract can cause vomiting and abdominal pain. When it invades through the skin, dermatitis and eczema will occur. The most harmful thing is the risk of cancer caused by long-term or short-term contact or inhalation. There is a lasting danger to the environment. Inhalation of high concentration of hexavalent chromium compounds can cause hoarseness, runny nose, sneezing, itching, nosebleeds, ulcers, perforation of nasal septum and bronchiectasis. Skin contact can lead to ulcers or allergic reactions (hexavalent chromium is one of the most allergic metals, second only to nickel). Excessive intake of chromium can lead to kidney and liver damage, nausea, gastrointestinal irritation, gastric ulcer, spasm and even death.

100g potassium dichromate will definitely kill people if ingested directly from the digestive tract. Experiments show that aquatic organisms can be killed when the concentration of hexavalent chromium in water exceeds 10ppm (one in 100,000).