Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 2-Hydroxy-4-(methylthio)butyric Acid
Price: Check
Purity: 85.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: 2-Hydroxy-4-(methylthio)butyric Acid
Price: ￥288.0/1g ￥798.0/5g
Purity: 98.0%
Stocking Period: 1 Day
Contact: Liu jia
Email: 2130147988@qq.com

DC Chemicals Limited
China
Product Name: Desmeninol
Price: $Inquiry/100mg $Inquiry/250mg $Inquiry/500mg
Purity: 98.0%
Stocking Period: 3 Day
Contact: Tony Cao
Email: sales@dcchemicals.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2-Hydroxy-4-(methylthio)butanoic acid
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

Henan Tianfu Chemical Co., Ltd.
China
Product Name: 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID
Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
Purity: 99.0%
Stocking Period: Inquiry
Contact: Anson
Email: info@tianfuchem.com

583-91-5

583-91-5 structure

583-91-5 structure

Name: 2-Hydroxy-4-(methylthio)butyric Acid
Chemical Name: 2-hydroxy-4-methylsulfanylbutanoic acid
CAS Number: 583-91-5
Molecular Formula: C₅H₁₀O₃S
Molecular Weight: 150.196
Catalog: API Feed drug additive
Create Date: 2018-06-11 20:01:24
Modify Date: 2025-08-25 16:33:45

Name	2-hydroxy-4-methylsulfanylbutanoic acid
Synonyms	4-methylthio-2-hydroxybutyric acid MHA acid DL-2-Hydroxy-4-(methylthio)butyric acid 4-methylmercapto-2-hydroxy-butyric acid MHA Butanoic acid,2-hydroxy-4-(methylthio) EINECS 209-523-0 2-Hydroxy-4-(methylmercapto)butyric Acid Desmeninol 2-Hydroxy-4-(methylthio)-butanoic Acid Alimet 2-Hydroxy-4-(methylsulfanyl)butanoic acid Butanoic acid, 2-hydroxy-4-(methylthio)- α-Hydroxy-DL-methionine MHA-FA MFCD00070490 2-hydroxy-4-(methylthio)butyric acid [14C]-DL-HMB Methionine hydroxy analog

Density	1.3±0.1 g/cm3
Boiling Point	316.5±27.0 °C at 760 mmHg
Molecular Formula	C₅H₁₀O₃S
Molecular Weight	150.196
Flash Point	145.2±23.7 °C
Exact Mass	150.035065
PSA	82.83000
LogP	0.35
Vapour Pressure	0.0±1.5 mmHg at 25°C
Index of Refraction	1.529

CHEMICAL IDENTIFICATION

RTECS NUMBER :: ET4731500

CHEMICAL NAME :: Butyric acid, 2-hydroxy-4-(methylthio)-

CAS REGISTRY NUMBER :: 583-91-5

LAST UPDATED :: 199710

DATA ITEMS CITED :: 4

MOLECULAR FORMULA :: C5-H10-O3-S

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 3478 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: TOLED5 Toxicology Letters. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1977- Volume(issue)/page/year: 31(Suppl),54,1986 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 83811 No. of Facilities: 92 (estimated) No. of Industries: 2 No. of Occupations: 3 No. of Employees: 440 (estimated)

Hazard Codes	Xi
Risk Phrases	R23/24/25
Safety Phrases	S26-S36/37/39-S45
RTECS	ET4731500

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