Biphenyl

High-Purity Biphenyl Reference Materials for Accurate Residue Analysis

Ensure precise and reliable residue analysis with HPC Standards GmbHs high-purity biphenyl reference materials. Essential for food and environmental laboratories, our products meet the highest international quality standards, guaranteeing compliance with regulatory limits. Trust HPC Standards GmbH for your analytical needs in pesticide, veterinary product, and metabolite testing.

Product	Catalog No./ CAS No.	Quantity	Price
Biphenyl solution Concentration: 100 µg/ml Solvent: Cyclohexane	674050 92-52-4	1X5ML	Please log in.
Biphenyl solution Concentration: 100 µg/ml Solvent: Acetonitrile	685784 92-52-4	1X1ML	Please log in.
Biphenyl solution Concentration: 100 µg/ml Solvent: Ethyl acetate	688572 92-52-4	1X5ML	Please log in.
ISO 17034 Reference Material Biphenyl	688703 92-52-4	1X250MG	Please log in.
ISO 17034 Certified Reference Material Biphenyl	688704 92-52-4	1X100MG	Please log in.
D10-Biphenyl	675793 1486-01-7	1X100MG	Please log in.
D10-Biphenyl solution Concentration: 100 µg/ml Solvent: Cyclohexane	680836 1486-01-7	1X1ML	Please log in.

High-purity reference materials for accurate and reliable residue analysis in food and environmental laboratories.

Overview

Biphenyl, also known as diphenyl, phenylbenzene, and 1,1′-biphenyl, is an organic compound that forms colorless crystals. It is an aromatic hydrocarbon with the molecular formula C₁₂H₁₀. Biphenyl is notable as a starting material for the production of polychlorinated biphenyls (PCBs), which were once widely used as dielectric fluids and heat transfer agents.

Biphenyl is insoluble in water but soluble in typical organic solvents. It has a distinctively pleasant smell and is used in various industrial applications.

Uses

Biphenyl is used as an intermediate for the production of a host of other organic compounds such as emulsifiers, optical brighteners, crop protection products, and plastics. It is also used in a eutectic mixture with diphenyl ether as a heat transfer agent, stable up to 400°C.

Additionally, biphenyl undergoes sulfonation to produce p-hydroxybiphenyl and p,p′-dihydroxybiphenyl, which are useful fungicides. Polychlorinated biphenyls (PCBs) derived from biphenyl were once popular pesticides.

Regulatory

Biphenyl is regulated due to its potential health and environmental impacts. It is listed under various regulatory frameworks, including the European Chemicals Agency (ECHA) and the National Institute for Occupational Safety and Health (NIOSH). The permissible exposure limit (PEL) and recommended exposure limit (REL) for biphenyl are both set at TWA 1 mg/m³ (0.2 ppm).

In the European Union, biphenyl is no longer approved as a food additive.

Monitoring

Monitoring biphenyl levels in the environment and food products is crucial to ensure compliance with regulatory limits. Laboratories conducting residue analysis rely on high-purity reference materials to achieve accurate and reliable results.

HPC Standards GmbH provides high-purity reference materials for biphenyl, tested according to international quality requirements and meeting the highest industrial standards.

Health Impact

Biphenyl is mildly toxic and can be degraded biologically into nontoxic compounds. Some bacteria are capable of hydroxylating biphenyl and its polychlorinated biphenyls (PCBs). The median lethal dose (LD₅₀) for biphenyl varies across different species, with values such as 2400 mg/kg (oral, rabbit) and 3280 mg/kg (oral, rat).

Exposure to biphenyl can cause skin and eye irritation, respiratory issues, and long-term environmental damage.

Environmental Impact

Biphenyl occurs naturally in coal tar, crude oil, and natural gas. It can be isolated from these sources via distillation. Industrially, biphenyl is produced as a byproduct of the dealkylation of toluene and the oxidative dehydrogenation of benzene.

Biphenyl prevents the growth of molds and fungus, making it useful as a preservative for citrus fruits during transportation. However, its environmental persistence and potential for bioaccumulation necessitate careful monitoring and regulation.

Safety Measures

Handling biphenyl requires adherence to safety measures to prevent exposure. The Globally Harmonized System (GHS) classifies biphenyl with hazard statements H315 (causes skin irritation), H319 (causes serious eye irritation), H335 (may cause respiratory irritation), and H410 (very toxic to aquatic life with long-lasting effects).

Precautionary statements include P261 (avoid breathing dust/fume/gas/mist/vapors/spray), P273 (avoid release to the environment), and P280 (wear protective gloves/protective clothing/eye protection/face protection).

Analytical Standards

HPC Standards GmbH specializes in the manufacture of high-purity reference materials for biphenyl, ensuring accurate and reliable residue analysis. Our products are essential for laboratories conducting food and environmental analysis to ensure compliance with regulatory limits.

Our reference materials are tested according to international quality requirements and meet the highest industrial standards, making us a competent partner in the fields of food and environmental analysis.