Nonylphenol (NP) is the commercially most important member of the group of alkyl phenols. The term “nonylphenol” represents a large num-ber of isomeric compounds, varying in the point of attachment of the nonyl group to the phenol molecule, and in the degree of branching in the nonyl moiety. Commercially produced nonylphenols are predominantly
According to the classification provided by companies to ECHA in CLP notifications this substance is toxic to aquatic life with long lasting effects, causes serious eye damage, is harmful if swallowed and causes skin irritation. Breakdown of all 4512 C&L notifications submitted to ECHA
Nonylphenol and its ethoxylates (NP and NPEs) have been used for more than 40 years as detergents, emulsifiers, wetting agents and dispersing agents. From data obtained by Environment Canada, an estimated 18,000 tonnes of NP and NPEs were used in Canada in 1998. Toxicity of nonylphenol, nonylphenol monoethoxylate, and nonylphenol diethoxylate and mixtures of these compounds to Pimephales promelas (fathead minnow) and Ceriodaphnia dubia. Archives of Environmental Contamination and Toxicology . 53:599-606. The toxicity of NPEs to aquatic organisms increases as the length of the ethoxylate chain ventanamagica.site by: /06/26 · NPEs (nonylphenol ethoxylates) break down in the environment into nonylphenol (NP), one of the most notorious examples of persistent, bioaccumulative and toxic chemicals (PBTs).
toxicity tests were collected from the littoral area of Sancti Petri (Gulf of Cadiz, southwest of Iberian Peninsula). Main physico-chemical and biological characteristics of the sea water used are summarized in Table I. Assessment of the Biodegradability and Ecotoxicty of a Nonylphenol Ethoxylate Surfactant in Littoral Waters Among the most used chemicals in the world are nonionic surfactants. One of these environmental pollutants is nonylphenol ethoxylate (NP-9), also known as Tergitol, and its degradation product, nonylphenol (NP). The objective of this work was to determine the toxicity of NP and NP-9 in Caenorhabditis elegans. chemistry properties, toxicity and analytical methods in various matrices.
Intergenerational toxicity of nonylphenol ethoxylate (NP-9) in Caenorhabditis elegans. De la Parra-Guerra A(1), Stürzenbaum S(2), Olivero-Verbel J(3). Author information: (1)Environmental and Computational Chemistry Group, University of Cartagena, Cartagena, Colombia.
Every brand contained toxic chemicals – perfluorated chemicals (PFCs), phthalates, nonylphenol, nonylphenol ethoxylate (NPE), and cadmium. Det mest Inhalation of toxic gases and chemicals.
We simulated the formation of halogenated by-products of biodegradation products of a nonionic surfactant, nonylphenol ethoxylate (NPE), and evaluated the toxicity of these by-products. Most NPE derivatives bearing shortened ethylene oxide (EO) chains (abbreviated as NPnEO) and nonylphenol carboxylate (NPnEC) disappeared within 24 h. In both NPnEO and NPnEC, benzene rings are substituted by
NPEs are high-volume chemicals that have been used for more than 40 years as detergents, emulsifiers, wetting agents and dispersing agents. Nonylphenol polyethoxylate-containing products are used in many sectors, including textile […] 2018-06-20 · The U.S. Environmental Protection Agency (EPA) expanded on June 12, 2018, the list of chemicals subject to reporting under the Emergency Planning and Community Right-to-Know Act (EPCRA) Toxics Release Inventory (TRI). The list now includes a category containing 13 nonylphenol ethoxylates (NPE). Since they are highly persistent and hydrophobic, they accumulate mostly on sludge.In this study using Anaerobic Toxicity Assay (ATA) tests, the toxicity of a model nonylphenol compound, nonylphenol diethoxylate (NP2EO), for anaerobic digestion of sludge was determined. ETHOXYLATED NONYLPHENOL ENP 9.20 SATURATED LIQUID DENSITY Temperature (degrees F) Pounds per cubic foot N O T P E R T I N E N T 9.21 LIQUID HEAT CAPACITY Temperature (degrees F) British thermal unit per pound-F N O T P E R T I N E N T 9.22 LIQUID THERMAL CONDUCTIVITY Temperature (degrees F) British thermal unit inch per hour-square foot-F N O T Toxicity of Nonylphenol Ethoxylate Metabolites Many countries, large corporations and scientific entities have classified NPE metabolites as toxic.
NPEs, though less toxic than NP,
Get the Facts: NPEs (nonylphenol ethoxylates) · Hormone (endocrine) disruption · Extreme aquatic toxicity · Skin and eye irritation · Reproductive harm · Birth defects
Table 2.1 Estimated uses of nonylphenol ethoxylate surfactants (CES, 1993) NP and OP are persistent in the environment and are of much higher toxicity than
5 Jan 2017 Nonylphenol ethoxylate-6. Shrimp. Penaeus vannamei. Acute toxicity. Abstract: Nonylphenol ethoxylate-6 (NP6EO) is widely used in industrial
2004. Toxicity of Nonylphenol Ethoxylate. Metabolites.
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Since they are highly persistent and hydrophobic, they accumulate mostly on sludge.In this study using Anaerobic Toxicity Assay (ATA) tests, the toxicity of a model nonylphenol compound, nonylphenol diethoxylate (NP2EO), for anaerobic digestion of sludge was determined. ETHOXYLATED NONYLPHENOL ENP 9.20 SATURATED LIQUID DENSITY Temperature (degrees F) Pounds per cubic foot N O T P E R T I N E N T 9.21 LIQUID HEAT CAPACITY Temperature (degrees F) British thermal unit per pound-F N O T P E R T I N E N T 9.22 LIQUID THERMAL CONDUCTIVITY Temperature (degrees F) British thermal unit inch per hour-square foot-F N O T Toxicity of Nonylphenol Ethoxylate Metabolites Many countries, large corporations and scientific entities have classified NPE metabolites as toxic. Canada classified NPE metabolites as toxic, as they are “entering the environment in a quantity or concentration or under conditions that have or may have an immediate or long-term purpose cleaning products containing nonylphenol ethoxylates. As NPE clearly requires replacement, mainly due to the environmental toxicity of the primary degradate (nonylphenol, or NP), the objective of this AA is to identify an appropriate alternative chemical(s) as a substitute surfactant.
NP is highly irritating and corrosive to the skin and eye, but does not have significant skin sensitizing potential. Fathead minnows were exposed to 4-nonylphenol (NP) or nonylphenol ethoxylate (NPEO) to determine the effects of these weak estrogen agonists on secondary sex characteristics and gonads of sexually mature males and females during 42-day continuous-flow exposures. Nonylphenol and its ethoxylates.
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In sewage treatment plants, nonylphenol ethoxylate degrades into nonylphenol, which is found in river water and sediments as well as soil and groundwater. Nonylphenol photodegrades in sunlight, but its half-life in sediment is estimated to be more than 60 years.
toxicity tests were collected from the littoral area of Sancti Petri (Gulf of Cadiz, southwest of Iberian Peninsula). Main physico-chemical and biological characteristics of the sea water used are summarized in Table I. Assessment of the Biodegradability and Ecotoxicty of a Nonylphenol Ethoxylate Surfactant in Littoral Waters Among the most used chemicals in the world are nonionic surfactants. One of these environmental pollutants is nonylphenol ethoxylate (NP-9), also known as Tergitol, and its degradation product, nonylphenol (NP).