2-Hydroxy-4-(methylthio)buttersure

2-hydroxy-4-(methylthio)-butanoic acid is a light brown liquid. (USCG, 1999)

Light brown liquid; [CAMEO] Light brown to brown liquid with an odor of sulfur; [MSDSonline]

Solid

Danger

H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]

P261, P264, P264+P265, P271, P273, P280, P302+P352, P304+P340, P305+P354+P338, P317, P319, P321, P332+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 5 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Not Classified

Danger

Regulation (EC) No 1831/2003 (amended)

2-Hydroxy-4-(methylthio)butanoic acid: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.

An organosulfide, alcohol, and organic acid. Organosulfides are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid. Flammable and/or toxic gases are generated by the combination of alcohols with alkali metals, nitrides, and strong reducing agents. They react with oxoacids and carboxylic acids to form esters plus water. Oxidizing agents convert them to aldehydes or ketones. Alcohols exhibit both weak acid and weak base behavior. They may initiate the polymerization of isocyanates and epoxides. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt.

Skin Irrit. 2 (100%)

Acute toxicity (Oral) - Category 5

METHIONINE PRECURSORS & METHIONINE ANALOGS WERE TESTED FOR THEIR ABILITY TO REPLACE OR TO ANTAGONIZE L-METHIONINE IN THE GROWTH OF PHYSARUM POLYCEPHALUM. 2-HYDROXY-4-(METHYLTHIO)BUTANOIC ACID SUPPORTED GROWTH, WHEN SUBSTITUTED FOR L-METHIONINE.

CHICK LIVER HOMOGENATES CATALYZED THE OXIDATION OF 2-HYDROXY-4-(METHYLTHIO)BUTANOIC ACID TO KETOMETHIONINE & BOTH CHICK LIVER SUPERNATANTS & RAT LIVER SUPERNATANTS CONVERTED KETOMETHIONINE TO THE HYDROXY DERIVATIVE OR TO METHIONINE.

IN RAT TISSUE, BOTH FLAVINE COENZYME & GLUTAMINE ARE REQUIRED FOR THE CONVERSION OF 2-HYDROXY-4-METHYLTHIOBUTYRIC ACID INTO METHIONINE. PER GRAM OF TISSUE, THE KIDNEY POSSESSES GREATER CONVERSION ACTIVITY THAN THE LIVER, BRAIN, SMALL INTESTINE, & MUSCLE, ALTHOUGH ON A TOTAL ORGAN BASIS THE LIVER IS THE MOST IMPORTANT. MOST OF THE CONVERSION ACTIVITY IS LOCATED IN THE SUPERNATANT FRACTION OF THE LIVER.

Methionine hydroxy analog is used as a livestock dietary supplement; [Merck Index]

Farming (Pesticides) [Category: Industry]

CALCIUM SALT IN POULTRY FEED