65-82-7

Name	N-Acetyl-L-methionine
CAS	65-82-7
EINECS(EC#)	200-617-7
Molecular Formula	C7H13NO3S
MDL Number	MFCD00064441
Molecular Weight	191.25
MOL File	65-82-7.mol

Chemical Properties

Appearance	white crystals
Melting point	103-106 °C(lit.)
alpha	-20 º (c=4 H2O)
Boiling point	235 °C(Press: 12 Torr)
density	1.2684 (rough estimate)
refractive index	-21 ° (C=1, H2O)
storage temp.	0-6°C
solubility	methanol: soluble100mg/mL, clear, colorless
form	Solid
pka	3.50±0.10(Predicted)
color	White to Off-White
Stability:	Stable. Incompatible with strong oxidizing agents.
optical activity	[α]20/D -21.0±1.0°, c = 1% in H2O
Merck	14,96
BRN	1725552
InChIKey	XUYPXLNMDZIRQH-LURJTMIESA-N
LogP	-0.885 (est)
CAS DataBase Reference	65-82-7(CAS DataBase Reference)
NIST Chemistry Reference	N-acetylmethionine(65-82-7)
EPA Substance Registry System	L-Methionine, N-acetyl- (65-82-7)

Safety Data

Hazard Codes	Xi
Risk Statements	R36/37/38:Irritating to eyes, respiratory system and skin . less more
Safety Statements	S24/25:Avoid contact with skin and eyes . S36:Wear suitable protective clothing . S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . less more
WGK Germany	3
RTECS	PD0480000
TSCA	Yes
HazardClass	IRRITANT
HS Code	29309090
Safety Profile	Poison by intravenous route. When heated to decomposition emits toxic fumes of NOX,. less more

Raw materials And Preparation Products

Hazard Information

Material Safety Data Sheet(MSDS)

Questions And Answer

Identification Test
Take a sample of 250mg, get it dissolved it in 2.5ml isopropyl alcohol and get it diluted with water to 25ml. Take this liquid of 10ml and get it diluted with water to 100m1. Then take the liquid of 0.5,30 and 50μ1 after two dilutions. Drop it at the place with a distance of 2cm from the bottom edge of the thin-layer chromatographic plate. The plate is coated with silica gel (Namely, 20cm * 20cm Brinkman silica gel of 60.250nm, or the equivalent). In a sealed and balanced thin-layered chromatography expansion tank, The chromatography was splayed out by 10cm, and the developer was composed of n-butanol and the mixture of acetic acid and water in the proportion 75：20=20.

Dry the plate overnight. Then spray the chromatography plate with a new iodoplatinate solution mixed with 10 percent chloroplatinic acid of 3ml, water of 97ml and 6 percent potassium iodide solution of 100ml. The sample shall be formed - a separate color spot with a Rf value of 0.67~0.1 ;
Content Analysis
Weigh accurately about 250mg sample and put it in a flask with glass stopper. Add 100ml water, 5g dipotassium hydrogen phosphate, 2g potassium dihydrogen phosphate and 2g potassium iodide. Get it fully mixed and dissolved, plus 0. 1mol/L iodine solution of 50.0m1. Then stopper it and blend it. Leave it stand for 30 minutes and titrate excess iodine with 0.1mol / L sodium thiosulfate. Meanwhile conduct blank titration experiment. Iodine solution per Ml 0.1mol/L equals to this product (C7H13NO3S) 9.563mg. ;
Toxicity Grade
Safe for food(FDA，§172．372，2000). ;
Acute Toxicity
Vein - mouse LD50: 435 mg / kg;
Use Quantity
Account for 3.1% of the total protein content in food (Calculated by free L- methionine).
It shall not be used for infant food and food containing adding nitrite / nitrate (FDA, 172.3722000). ;

Spectrum Detail

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65-82-7

Chemical Properties

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Raw materials And Preparation Products

Raw materials

Hazard Information

Chemical Properties

Uses

Definition

Purification Methods

Material Safety Data Sheet(MSDS)

Questions And Answer

Identification Test

Content Analysis

Toxicity Grade

Acute Toxicity

Use Quantity

Spectrum Detail

Well-known Reagent Company Product Information

Supplier

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