H-Asp-OtBu CAS 4125-93-3 L-Aspartic Acid α-tert-Butyl Ester Purity >98.0% (HPLC)

Short Description:

Chemical Name: L-Aspartic Acid α-tert-Butyl Ester

Synonyms: H-Asp-OtBu 

CAS: 4125-93-3

Purity: >98.0% (HPLC)

Appearance: White to Off-White Powder

Amino Acids and Derivatives, High Quality

Contact: Dr. Alvin Huang

Mobile/Wechat/WhatsApp: +86-15026746401

E-Mail: alvin@ruifuchem.com


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Description:

Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer of L-Aspartic Acid α-tert-Butyl Ester (H-Asp-OtBu) (CAS: 4125-93-3) with high quality. Ruifu Chemical supplys a series of amino acids and derivatives. We can provide worldwide delivery, competitive price, small and bulk quantities available. Purchase H-Asp-OtBu, Please contact: alvin@ruifuchem.com

Chemical Properties:

Chemical Name L-Aspartic Acid α-tert-Butyl Ester  
Synonyms H-Asp-OtBu; L-Asp-OtBu; L-Aspartic Acid α-tert-Butyl Ester; L-Aspartic Acid 1-tert-Butyl Ester; L-Aspartic Acid alpha-tert-Butyl Ester; tert-Butyl L-Aspartate; (S)-3-Amino-4-tert-Butoxy-4-Oxobutanoic Acid
Stock Status In Stock, Production Capacity To Tons 
CAS Number 4125-93-3
Molecular Formula C8H15NO4
Molecular Weight 189.21 g/mol
Melting Point 180.0±5.0℃ 
Density 1.162±0.06 g/cm3 
Storage Temp.  Cool & Dry Place (2~8℃) 
COA & MSDS Available
Category   Amino Acids and Derivatives 
Brand Ruifu Chemical

Specifications:

Items Inspection Standards Results
Appearance White to Off-White Powder White Powder
Specific Rotation [α]20/D +25.0°±2.0° (C=1, H2O) +24.8°
Melting Point 180.0±5.0℃ 178.5~180.1℃
Loss on Drying <0.50% 0.36%
H-Asp-OtBu Purity >98.0% (HPLC) 98.82%
Mass Spectrum In Accordance With the Standard Complies
NMR Spectrum In Accordance With the Standard Complies
Conclusion The product has been tested & complies with the given specifications

Package & Storage:

Package: Fluorinated Bottle, Aluminium foil bag, 25kg/Cardboard Drum, or according to customer's requirement.

Storage Condition: Store in sealed containers at cool and dry (2~8℃) warehouse away from incompatible substances. Protect from light and moisture.

Advantages:

Sufficient Capacity: Sufficient facilities and technicians

Professional Service: One stop purchasing service

OEM Package: Custom package and label available

Fast Delivery: If within stock, three days delivery guaranteed

Stable Supply: Maintain reasonable stock    

Technical Support: Technology solution available

Custom Synthesis Service: Ranged from grams to kilos

High Quality: Established a complete quality assurance system

FAQ:

How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com 

15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.

Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.

Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.

Quality AssuranceStrict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.

SamplesMost products provide free samples for quality evaluation, shipping cost should be paid by customers.

Factory AuditFactory audit welcome. Please make an appointment in advance.

MOQ? No MOQ. Small order is acceptable.

Delivery Time? If within stock, three days delivery guaranteed.

TransportationBy Express (FedEx, DHL), by Air, by Sea.

Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.

Custom SynthesisCan provide custom synthesis services to best fit your research needs.

Payment TermsProforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc. 

Application:

L-Aspartic Acid α-tert-Butyl Ester (H-Asp-OtBu) (CAS: 4125-93-3), amino acids and derivatives, used in peptide synthesis, used as an organic synthesis intermediate, pharmaceutical intermediate, biochemical reagent or chemical reagent.   

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