• Objective: the aim of this study was to evaluate the influence of different concentrations of carbamide peroxide (CP) bleaching agents on the fluorescence of three composites. (bvsalud.org)
  • Conclusion: fluorescence intensity may be affected by the action of carbamide peroxide bleaching agents, depending on its concentration and the composite characteristics. (bvsalud.org)
  • The aim of this clinical study was to evaluate the effectiveness of a whitening toothpaste containing 3% carbamide peroxide and lactoperoxidase. (hindawi.com)
  • Hydrogen peroxide (HP) and its precursor, carbamide peroxide (CP), are the most widely used whitening agents [ 4 ]. (hindawi.com)
  • Purpose: To test the hypothesis that the higher the concentration of carbamide peroxide, the greater is its cytotoxicity to fibroblast cells. (pucrs.br)
  • Methods: Three concentrations of carbamide peroxide (10%, 16%, and 22%) used in home bleaching techniques were evaluated regarding their cytotoxic effect on gingival tissues. (pucrs.br)
  • Conclusion: The 22% carbamide peroxide group was more toxic than the other two groups (16% and 10% concentration) regardless of the exposure time. (pucrs.br)
  • Because hydrogen peroxide is used in many industries for a variety of purposes, workers in such industries may be exposed to this chemical through inhalation or contact with the skin. (cdc.gov)
  • Inhalation of household strength hydrogen peroxide (3%) can cause respiratory irritation. (cdc.gov)
  • Exposure to H₂O₂ can occur from inhalation or direct contact. (chemdaq.com)
  • Inhalation - Remove from the area of exposure to fresh air. (ihcworld.com)
  • Inhalation of vapors from concentrated (over 10%) hydrogen peroxide can cause pulmonary irritation. (ewg.org)
  • Emergency measure - Inhalation: Remove patient from exposure. (europa.eu)
  • The effects of COV inhalation were assessed 1, 28, and 90 d post-exposure. (cdc.gov)
  • The original 1858 synthesis by Liebig reacted benzoyl chloride with barium peroxide, a reaction described by the following idealized equation: 2 C6H5C(O)Cl + BaO2 → (C6H5CO)2O2 + BaCl2 Benzoyl peroxide is usually prepared by treating hydrogen peroxide with benzoyl chloride under alkaline conditions. (wikipedia.org)
  • The Agency for Toxic Substances & Disease Registry (ATSDR) , for example, note that low concentrations of hydrogen peroxide can cause skin irritation and blistering. (medicalnewstoday.com)
  • Occupational exposures to mists and vapours from strong inorganic acids and other industrial chemicals / this publication represents the views and expert opinions of an IARC Working Group on the Evaluation of Carcinogenic Risks to Humans which met in Lyon, 15-22 October 1991. (who.int)
  • Evaluates the carcinogenic risk to humans posed by occupational exposure to mists and vapours from strong inorganic acids and by other industrial chemicals. (who.int)
  • Hydrogen peroxide is a manufactured chemical, although small amounts of hydrogen peroxide gas may occur naturally in the air. (cdc.gov)
  • The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are present. (cdc.gov)
  • In industry, hydrogen peroxide in higher concentrations is used as a bleach for textiles and paper, as a component of rocket fuels, and for producing foam rubber and organic chemicals. (cdc.gov)
  • After adjusting for these confounders, chemical and physical exposures, with the exception of poor ventilation and smelling chemicals, showed no significant relation to the taking of sick leave within the past year. (bmj.com)
  • Occupational exposure to hazardous chemicals has been identified as the primary risk faced by workers. (bmj.com)
  • Certain commonly used chemicals in the laboratory can form peroxides upon exposure to oxygen in air. (sc.edu)
  • Formation and accumulation of peroxides makes peroxide-forming chemicals low-power explosives that are sensitive to shock, sparks and ignition sources. (sc.edu)
  • The inventory of such chemicals must be restricted to amounts needed for short-term use so that the chemicals are used up before significant formation and accumulation of peroxides occur. (sc.edu)
  • Chemicals that form explosive levels of peroxides without concentration. (sc.edu)
  • These chemicals are a peroxide hazard on concentration (distillation/evaporation). (sc.edu)
  • This evaluation found that hospital cleaning staff using a product containing HP, AA, and PAA frequently reported work-related symptoms despite measured exposures that were below established limits for two of the three chemicals for which full-shift exposure limits are established. (cdc.gov)
  • The efficiency of these kinds of toothpaste is questionable because of the low concentration of peroxide [ 10 ]. (hindawi.com)
  • The enzyme (lactoperoxidase) has been used as an activating agent to reduce peroxide concentration in order to minimize the risk of undesirable effects [ 13 ]. (hindawi.com)
  • This innovative technology independently verifies that the stated values of exposure time, temperature and vaporized hydrogen peroxide concentration have been met. (3m.com)
  • Based on the glyphosate limits defined by Codex Alimentarius Commission and European Food Safety Authority, this study established pregnant sow exposure models to investigate the influence of low (L-GBHs, 20 mg/kg) and high concentration GBHs (H-GBHs, 100 mg/kg) on the intestinal health of offspring and proposed the protective mechanism mediated by betaine. (nih.gov)
  • Children exposed to the same levels of hydrogen peroxide vapor as adults may receive larger doses because they have greater lung surface area:body weight ratios and increased minute volumes:weight ratios. (cdc.gov)
  • short stature and the higher levels of hydrogen peroxide vapor found nearer to the ground. (cdc.gov)
  • PCO works by circulating low levels of hydrogen peroxide to kill pathogens like viruses. (translink.ca)
  • Occupational exposure to benzoyl peroxide. (epa.gov)
  • In January 2015, the National Institute for Occupational Health (NIOSH), received a request to conduct a health hazard evaluation at a Pennsylvania hospital using a new surface cleaning product consisting of hydrogen peroxide (HP), peroxyacetic acid (PAA), and acetic acid (AA). (cdc.gov)
  • All air sampling measurements for HP (ranging from 6 parts per billion (ppb) to 511 ppb) and AA (7 ppb-530 ppb) were below their respective occupational exposure limits of 1,000 ppb and 10,000 ppb ( 2 ). (cdc.gov)
  • The Association of Occupational and Environmental Clinics recently listed this product as an asthmagen in its Exposure Database ( 4 ). (cdc.gov)
  • Finally, physicians should be aware of the potential adverse health effects of occupational exposure to cleaning products and disinfectants when evaluating patients with respiratory and skin complaints. (cdc.gov)
  • The product grinder's total particulate exposure exceeded the Occupational Safety and Health Administration (OSHA) and American Conference of Governmental Industrial Hygienists (ACGIH), 8-hr time-weighted average (TWA) exposure limits. (cdc.gov)
  • Hence, in recent years, dermatologists and also occupational physicians have become increasingly aware of the airborne source of contact dermatitis, resulting mainly from exposure to irritants or allergens. (cdc.gov)
  • Table 1 occupational physicians have become increasingly gives the lists (that do not pretend to be exhaust- aware of the airborne source of contact dermatitis, ive) with the airborne causes of dermatoses that resulting mainly from exposure to irritants or aller- we could retrieve. (cdc.gov)
  • In the first and most extensive monograph, evaluations draw upon numerous studies of occupational exposures in industries where the use of strong inorganic acids is particularly heavy. (who.int)
  • Studies of occupational exposure have demonstrated an excess of nasal sinus cancer, laryngeal cancer, and lung cancer. (who.int)
  • On the basis of these data, the monograph concludes that occupational exposure to strong-inorganic-acid mists containing sulfuric acid is carcinogenic to humans. (who.int)
  • The guidelines address treatment of acute and chronic phases of Q fever illness in children, adults, and pregnant women and the management of occupational exposures. (medscape.com)
  • In all studies considered, sulfuric acid mists were the most common exposure. (who.int)
  • Exposure to hydrogen peroxide can cause irritation of the eyes, throat, respiratory airway, and skin. (cdc.gov)
  • Exposure to household strength hydrogen peroxide can cause mild ocular irritation. (cdc.gov)
  • Ingestion of dilute solutions of hydrogen peroxide may result in vomiting, mild gastrointestinal irritation, gastric distension, and on rare occasions, gastrointestinal erosions or embolism (blockage of blood vessels by air bubbles). (cdc.gov)
  • Eye exposure to 3% hydrogen peroxide may result in pain and irritation, but severe injury is rare. (cdc.gov)
  • benzoyl peroxide, dapsone topical. (medscape.com)
  • Meanwhile, the Food and Drug Administration (FDA) have approved a hydrogen peroxide topical solution as a treatment for a type of noncancerous growth called seborrheic keratoses. (medicalnewstoday.com)
  • Effects of a 50 Hz electric field on plasma lipid peroxide level and antioxidant activity in rats med. (emf-portal.org)
  • The attenuation of metal/peroxide oxidative chemistry, as well as lipid peroxidation, appears to be the major chemical mechanisms by which NO may limit oxidative injury to mammalian cells. (researchgate.net)
  • These spermatozoa also experienced increased mitochondrial generation of reactive oxygen species after 1 week of exposure, with elevated DNA oxidation and fragmentation across all exposure periods. (nature.com)
  • Noise monitoring data indicated that the daily noise doses of the product grinder and a product buffer exceeded the OSHA permissible exposure limit, and 10 of 11 evaluated employees exceeded the NIOSH-recommended daily allowable noise dose. (cdc.gov)
  • We do not know if exposure to hydrogen peroxide may affect reproduction in humans. (cdc.gov)
  • The International Agency for Research on Cancer (IARC) has determined that hydrogen peroxide is not classifiable as to its carcinogenicity to humans. (cdc.gov)
  • However, persons whose clothing or skin is contaminated with concentrated hydrogen peroxide solution can secondarily contaminate personnel by direct contact or through off-gassing vapor. (cdc.gov)
  • Hydrogen peroxide vapor is heavier than air and may cause asphyxiation in enclosed, poorly ventilated, or low-lying areas. (cdc.gov)
  • No strong evidence supports the idea that higher concentrations of benzoyl peroxide are more effective than lower concentrations. (wikipedia.org)
  • Hydrogen peroxide is nonflammable, but it is a powerful oxidizing agent that can cause spontaneous combustion when it comes in contact with organic material. (cdc.gov)
  • Benzoyl peroxide is a chemical compound (specifically, an organic peroxide) with structural formula (C6H5−C(=O)O−)2, often abbreviated as (BzO)2. (wikipedia.org)
  • In terms of its structure, the molecule can be described as two benzoyl (C6H5−C(=O)−, Bz) groups connected by a peroxide (−O−O−). It is a white granular solid with a faint odour of benzaldehyde, poorly soluble in water but soluble in acetone, ethanol, and many other organic solvents. (wikipedia.org)
  • Employees were concerned with exposures to PVC glue, fiberglass, acetone, organic peroxide, and unsaturated polyester resins in the production of cultured marble vanities, bath tubs, and shower walls and floors. (cdc.gov)
  • To agents, a whitening effect is achieved.1 Therefore, conventional simplify the technique and make the whitening effect easier tooth whitening techniques mainly use peroxides as oxidant to obtain for patients, whitening toothpastes have been agents to be diffused into the tooth organic matrix and release developed. (bvsalud.org)
  • Minimize sun exposure following drug application. (nih.gov)
  • Recommendations to minimize exposures include improving existing ventilation systems, creating respiratory and hearing loss prevention programs, using improved hearing protection devices, and ensuring consistent use of respiratory protection. (cdc.gov)
  • [17] Exposure to ultraviolet (UV) radiation can cause direct photooxidation and decompose peroxides and carbonyl molecules. (wikipedia.org)
  • Hydrogen peroxide is a colorless liquid at room temperature with a bitter taste. (cdc.gov)
  • Hydrogen peroxide is a clear, colorless, noncombustible liquid. (cdc.gov)
  • Pure hydrogen peroxide is a crystalline solid below 12 EF and a colorless liquid with a bitter taste above 12 EF. (cdc.gov)
  • This chapter and the two other "auxiliary chapters" (Chapters 20 and 21 ) provide the support for certain points used in the proof that no safe dose of low-LET ionizing radiation exists -- either for acute exposure or for slow exposure -- with respect to human carcinogenesis. (ratical.org)
  • Acute radiation syndromes (ARS) Ionizing radiation injures tissues variably, depending on factors such as radiation dose, rate of exposure, type of radiation, and part of the body exposed. (msdmanuals.com)
  • Acute exposure to COV resulted in a reduction in mean arterial and diastolic blood pressures 1 and 28 d after exposure, changes in nitrate-nitrite and H(2)O(2) levels, and in the expression of transcripts and proteins that regulate inflammation, vascular remodeling, and the synthesis of NO in the heart and kidneys. (cdc.gov)
  • Hydrogen peroxide released to the atmosphere will react very rapidly with other compounds found in air. (cdc.gov)
  • If released to soil, hydrogen peroxide will be broken down by reacting with other compounds. (cdc.gov)
  • Benzoyl peroxide is mainly used as a radical initiator to induce chain-growth polymerization reactions, such as for polyester and poly(methyl methacrylate) (PMMA) resins and dental cements and restoratives. (wikipedia.org)
  • Hydrogen peroxide is unstable, decomposing readily to oxygen and water with release of heat. (cdc.gov)
  • It explodes when heated and unstable peroxides can be formed on storage and when the container is exposed to light. (ihcworld.com)
  • If a practitioner uses trial lenses, one of the peroxide systems can be used for disinfection of soft and RGP lenses. (aao.org)
  • Disinfection of trial hard lenses with a commercially available hydrogen peroxide contact lens disinfecting system currently approved for soft contact lenses. (cdc.gov)
  • Rigid gas permeable (RGP) trial fitting lenses can be disinfected using the above hydrogen peroxide disinfection system. (cdc.gov)
  • Until other disinfectants are shown to be suitable for disinfecting HTLV-III/LAV, contact lenses used in the eyes of patients suspected or known to be infected with HTLV-III/LAV are most safely handled by hydrogen peroxide disinfection. (cdc.gov)
  • The oxygen-oxygen bond in peroxides is weak, although this weakness is not indicated by the O-O bond distance. (wikipedia.org)
  • In rare cases, using hydrogen peroxide on wounds can cause an oxygen embolism . (medicalnewstoday.com)
  • Exposure to oxygen and sunlight are the two main factors in the oxidation of food, so food is preserved by keeping in the dark and sealing it in containers or even coating it in wax, as with cucumbers. (wikipedia.org)
  • Hydrogen peroxide can be toxic if ingested, inhaled, or by contact with the skin or eyes. (cdc.gov)
  • Sick leave and exposure to physical and chemical hazards were determined by self reporting. (bmj.com)
  • Benzoyl peroxide is mainly used in production of plastics and for bleaching flour, hair, plastics and textiles, as well as for acne treatment. (wikipedia.org)
  • Instead of trying products containing hydrogen peroxide, people in the U.S. should consult a doctor about the best acne treatment options. (medicalnewstoday.com)
  • Hydrogen peroxide is poorly absorbed through intact skin. (cdc.gov)
  • If you are sensitive to Benzoyl Peroxide or have very sensitive skin. (nih.gov)
  • Can hydrogen peroxide treat skin conditions? (medicalnewstoday.com)
  • Some people use hydrogen peroxide, or products that contain it, to address skin issues such as acne or hyperpigmentation. (medicalnewstoday.com)
  • Below, learn about the risks and applications of hydrogen peroxide in skin care. (medicalnewstoday.com)
  • People use hydrogen peroxide on the skin in many ways, such as to prevent infections in minor wounds, such as scrapes or small cuts. (medicalnewstoday.com)
  • Hydrogen peroxide has disinfecting and bleaching properties, and as a result, some people believe that it can combat infections, reduce blemishes, lighten the skin, and ease symptoms of certain conditions. (medicalnewstoday.com)
  • Always speak with a healthcare provider before using hydrogen peroxide on the skin. (medicalnewstoday.com)
  • Prolonged exposure to skin can cause dermatitis. (ihcworld.com)
  • Benzoyl peroxide unclogs skin pores. (healthlinkbc.ca)
  • Avoid the sun, because sun exposure triggers your skin to produce oil that may cause more acne. (healthline.com)
  • Vitamin D is manufactured in the skin following direct exposure to sunlight. (digitalnaturopath.com)
  • Usually 10-15 minutes exposure of hands, arms and face two to three times per week (depending on one's skin sensitivity) is enough to satisfy the body's vitamin D requirement. (digitalnaturopath.com)
  • If environmental services staff do report respiratory, skin, and/or eye symptoms, a combination of engineering and administrative controls might be needed to reduce employee exposures. (cdc.gov)
  • Furthermore, existing exposure limits might not be protective against asthma-like symptoms. (cdc.gov)
  • Benzoyl peroxide is a medication that has antibacterial effects and is a peeling agent . (medbroadcast.com)
  • plan to avoid unnecessary or prolonged exposure to sunlight and to wear protective clothing, sunglasses, and sunscreen. (medlineplus.gov)
  • People who are housebound and experience no sunlight exposure are unable to make vitamin D. (digitalnaturopath.com)
  • Treatment with benzoyl peroxide was proposed for wounds by Lyon and Reynolds in 1929, and for sycosis vulgaris and acne varioliformis by Peck and Chagrin in 1934. (wikipedia.org)