What is methylenedianiline used for?
What is methylenedianiline used for?
4,4′-Methylenedianiline is used mainly for making poly urethane foams, which have a variety of uses, such as insulat ing materials in mailing containers. It is also used for making coating materials, glues, Spandex® fiber, dyes, and rubber.
What is MDA OSHA?
4,4′ Methylenedianiline or MDA means the chemical, 4,4′-diaminodiphenylmethane, Chemical Abstract Service Registry number 101-77-9, in the form of a vapor, liquid, or solid. The definition also includes the salts of MDA.
Is MDA a carcinogen?
The International Agency for Research on Cancer (IARC) has classified MDA as a Group 2B, possible human carcinogen.
Where is formaldehyde used?
Formaldehyde is a strong-smelling, colorless gas used in making building materials and many household products. It is used in pressed-wood products, such as particleboard, plywood, and fiberboard; glues and adhesives; permanent-press fabrics; paper product coatings; and certain insulation materials.
What is the permissible limit to MDA?
10 ppb is the permissible exposure limit to MDA when using an 8-hour time-weighted average.
What does MDA mean in construction?
Methylenedianiline
Title: Methylenedianiline (MDA) Standard for Construction (29 CFR 1926.60); Extension of the Office of Management of Budget’s (OMB) Approval of Information-Collection (Paperwork) Requirements.
What food is formaldehyde in?
It’s also naturally occurring in many foods. Fruits like apples, bananas, grapes, and plums; vegetables like onions, carrots, and spinach; and even meats like seafood, beef, and poultry contain formaldehyde.
Is formaldehyde harmful to humans?
Health Effects of Formaldehyde Formaldehyde can cause irritation of the skin, eyes, nose, and throat. High levels of exposure may cause some types of cancers. Learn more from the Agency for Toxic Substances and Disease Registry about the health effects of formaldehyde exposure.
What is the permissible exposure limit to MDA in 8 hours?
What must employers provide for workers exposed to MDA?
The employer must provide personal protective equipment and clothing, at no cost to the employee, and ensure their proper use when the employee is subject to dermal exposure to MDA; where liquids containing MDA can be splashed into the eyes; or where airborne concentrations of MDA are in excess of the PEL.
What is MDA model?
Model Driven Architecture® (MDA®) is an approach to software design, development and implementation spearheaded by the OMG. MDA provides guidelines for structuring software specifications that are expressed as models. MDA separates business and application logic from underlying platform technology.
What is the purpose of MDA in developing systems?
Model Driven Architecture® (MDA®) is a software design approach for the development of software systems. It provides a set of guidelines for the structuring of specifications, which are expressed as models.
What are the effects of exposure to methylenedianiline?
Dermal Effects. The possibility that inhalation exposure to 4,4´-methylenedianiline could induce dermal sensitization was explored in guinea pigs (Leong et al. 1987) (see Section 2.2.3.2). The animals were exposed nose-only to 440 mg/m3of an aerosol of 4,4´-methylenedianiline 4 hours per day, 5 days per week for 2 weeks.
Is the smell of 4, 4’methylenedianiline toxic?
4,4′-DIAMINODIPHENYLMETHANE is a tan flake or lump solid with a faint fishlike odor. May be toxic by inhalation or ingestion, and may be irritating to skin.
How is methylenedianiline toxic to the bile ducts?
METHYLENEDIANILINE 34 2. HEALTH EFFECTS. dose studies demonstrated that 4,4´-methylenedianiline is selectively toxic to bile duct in rats and that hepatic lesions appear after the lesions to the bile ducts (Kanz et al.
What is the molecular weight of 4, 4’methylenedianiline?
4,4′-Methylenedianiline PubChem CID 7577 Synonyms 4,4′-Methylenedianiline 101-77-9 Molecular Weight 198.26 Date s Modify 2021-08-21 Create 2004-09-16