You are here：Home > news2020

How to Determine Whether a Chemical is Harmful to the Human Body

Posted Date:2020/12/11

"Is it harmful to humans?" This proposition is divided into different contact methods, some are food, some are contact, and some are inhalation.

Globally Harmonized Chemical Classification and Labeling System GHS

GHS defines the hazard classification of hazardous chemicals and develops a classification method. The GHS system [2] roughly divides the hazards of chemicals into 3 categories and 28 items:

1) Physical hazards (such as flammable liquids, oxidizing solids, etc. 16 items).

2) Health hazards (such as acute toxicity, skin corrosion/irritation, etc. 10 items).

3) Environmental hazards (for example, water, ozone layer, etc. 2 items).

Health hazards are the classification of harmful substances to the human body. It is possible to understand whether chemicals are harmful to the human body through known data.

For example, preservatives: tris pearate, benzoate, humectants: sodium hexametaphosphate, sodium tripolyphosphate, disodium hydrogen phosphate, etc. These substances are ordinary chemicals, which cannot be said to be harmful, but excessive addition is also harmful to health.

 Acute toxicity:

Under normal circumstances, when the oral and dermal toxicity data of a chemical is less than 5000mg/kg, it is harmful to the human body.

Skin corrosion/irritation:

Some chemicals are corrosive. For example: different concentrations of formic acid, phosphoric acid, or even hydrochloric acid and sulfuric acid. These chemicals can cause skin damage in contact with the skin.

Formic acid, also known as formic acid, was originally found and extracted from ant animals. It belongs to eight types of hazardous chemicals, but it is an important raw material for the industry, and it will not cause any harm to the human body as a rubber coagulant. Strong acids such as phosphoric acid, sulfuric acid, and hydrochloric acid are also widely used in food additives for acidity adjustment, and will not harm the human body within the permitted range!

According to the classification limit of GHS skin corrosion irritation, when the concentration of the ingredients in the mixture is lower than the value in the table below, it will generally not cause damage to the skin.

Carcinogenic:

Usually to distinguish whether it is harmful should be distinguished from the stability and safe dose of the chemical substance. For example: the well-known formaldehyde. The reason why it is recognized as harmful is that it causes cancer in the human body in small doses. The other is that formaldehyde is volatile, and glue must be used in furniture. Formaldehyde is an effective and low-cost chemical that increases the viscosity of glue. Furniture formaldehyde The hazard comes from the continuous release of formaldehyde from furniture, which has greatly exceeded the range that the human body can receive!