Issues with road transport tankers

Hydrogen peroxide (H2O2) is a colorless, viscous liquid that decomposes easily into water and oxygen. It is commonly used as an oxidizing agent, bleaching agent, and disinfectant, and is the preferred disinfectant for preventing contamination in homes and public places. For the convenience of storage, transportation, and use, the industrial \"alcohol extraction method\" is employed to convert H2O2 into solid sodium percarbonate crystals (with the chemical formula 2Na2CO3•3H2O2). These crystals are addition complexes of Na2CO3 and H2O2, possessing the properties of both. (1) Physical and chemical properties and uses: A colorless and transparent liquid, slightly pale blue in deeper layers. Density ； 1.44 ； Freezing point -0.4℃ ； Explosion limit: 26–100%. Used as an oxidizer, bleaching agent, bactericide, disinfectant, and colorant. High-concentration hydrogen peroxide can be used as a rocket propellant fuel. (II) Toxicity Its toxicity is primarily caused by its reactive oxidation effects, such as chemical burns to the eyes, skin, and mucous membranes, as well as causing ordinary clothing to catch fire. (III) Effects of short-term exposure: Since this substance is not volatile, the possibility of poisoning from inhaling its vapors is very low. Moreover, due to its strong burning sensation, the likelihood of it being swallowed is also minimal. Burns are mainly caused by skin contact, resulting in whitening of the local skin and hair (which can return to normal after some time), along with stinging and itching. (IV) Effects of long-term exposure: Chemical burns of varying degrees occur due to differences in dose, duration, and site of exposure. After penetrating the stratum corneum of the skin, it breaks down to produce oxygen, causing blisters to form on the epidermis. Since the stratum corneum is thicker in areas such as the palms, fingertips, and nail beds, and these areas have a high density of nerve endings, the pain is more intense and unbearable. Large doses and inadequate rinsing can leave permanent scars. Droplets that get into the eyes can cause conjunctivitis, iridocyclitis, as well as degeneration, necrosis, and clouding of the corneal epithelium, affecting vision or even leading to total blindness. (5) Fires and explosions: This product is a highly explosive oxidizer. It is non-flammable on its own, but it can react with combustible materials to generate enough heat to cause a fire; moreover, the oxygen released during its decomposition acts as a strong fuel source, which can ultimately lead to an explosion. In case of a fire, use water to extinguish it and cool other containers with water. If steam is observed coming from the vent of a container containing high-concentration hydrogen peroxide, all personnel should immediately retreat to a safe location, and operators must wear full protective gear. (VI) Chemical reactivity: It decomposes very easily in alkaline solutions, and decomposition can also occur under strong light, especially exposure to short-wavelength radiation. Mixtures formed with many organic substances such as sugars, starches, alcohols, and petroleum products are sensitive; they can explode under the effect of impact, heat, or electric sparks. When mixed with oxides, they pose a potential danger. (7) Personal protection – Skin: Rubber and neoprene gloves, natural rubber boots, PVC protective clothing, polyethylene aprons and sleeves, as well as head coverings should be used. Workplaces should be equipped with available safety showers and eye wash stations. eyes ； Wear goggles and a plastic mask. (8) First aid: Skin contact ； It should be rinsed immediately with water, or it can also be rinsed with a 3% potassium permanganate solution or a 2% sodium carbonate solution. If the skin burn causes severe pain, phenobarbital sodium or coffee should be used to prevent secondary infections. Eye contact: Rinse immediately with water for at least 15 minutes, then seek medical attention. Oral ingestion: If swallowed accidentally, induce vomiting or perform gastric lavage immediately, and take the affected person to the hospital for emergency treatment. (IX) Storage and Transportation: For storing more than 60% hydrogen peroxide, containers made of pure aluminum (99.6% or higher), polytetrafluoroethylene, or polychloroethylene should be used; impurities such as iron, rust, or dust must not enter the container. 20–60% hydrogen peroxide is stored in polyethylene drums or pure aluminum drums. The container lid should have vent holes. The storage area should be protected from direct sunlight, and it should have an adequate supply of water as well as fire hoses and spraying equipment. The premises must not contain fuel, oxidizers, organic substances, etc., and must be kept tidy and clean. Packaging methods: Types (I) and (II). (10) Safety and handling: Operators should wear full-body protective gear. In the event of a leak of high-concentration hydrogen peroxide, the spill should be washed down with water. If the temperature rises by more than 5°C above the ambient temperature, an appropriate amount of stabilizer (phosphoric acid) can be added, or the mixture can be diluted with distilled water. If decomposition cannot be controlled and the temperature is 10°C or more higher than the air temperature, hydrogen peroxide can be released urgently. In the event of a fire, extinguish it with water and cool other containers with water as well. If steam is seen coming from the container’s vent, all personnel should immediately retreat to a safe place. If hydrogen peroxide splashes on clothing, it should be rinsed immediately with water and removed. In the case of a 20–60% hydrogen peroxide leak, flush with large amounts of water; the diluted wastewater must not be discharged into the waste water system.