H-Asp(OtBu)-OH CAS 3057-74-7 L-Aspartic Acid 4-tert-Butyl Ester Purity >98.0% (HPLC)
Shanghai Ruifu Chemical Co., Ltd. is the leading manufacturer of L-Aspartic Acid 4-tert-Butyl Ester (H-Asp(OtBu)-OH) (CAS: 3057-74-7) 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)-OH , Please contact: alvin@ruifuchem.com
| Chemical Name | L-Aspartic Acid 4-tert-Butyl Ester |
| Synonyms | H-Asp(OtBu)-OH; L-Aspartic Acid β-tert-Butyl Ester; 4-tert-Butyl L-Aspartate; β-tert-Butyl L-Aspartate; L-Aspartic Acid 4-(1,1-Dimethylethyl) Ester; (S)-2-Amino-4-tert-Butoxy-4-Oxobutanoic Acid; Aspartic Acid β-tert-Butyl Ester |
| Stock Status | In Stock |
| CAS Number | 3057-74-7 |
| Molecular Formula | C8H15NO4 |
| Molecular Weight | 189.21 g/mol |
| Melting Point | 170.0~190.0℃ |
| Density | 1.162±0.06 g/cm3 |
| Sensitive | Hygroscopic |
| Storage Temp. | Cool & Dry Place (2~8℃) |
| COA & MSDS | Available |
| Category | Amino Acids and Derivatives |
| Brand | Ruifu Chemical |
| Items | Inspection Standards | Results |
| Appearance | White Powder | White Powder |
| Specific Rotation [α]20/D | -9.0°±2.0° (C=1, MeOH:H2O=4:1) |
-8.5° |
| Melting Point | 170.0~190.0℃ | 174.0~178.0℃ |
| Purity / Analysis Method | >98.0% (HPLC) | 98.8% |
| Clarity of Solution | 0.3 gram in 2ml TFA Clear Solution | Complies |
| TLC Analysis | One Spot | One Spot |
| 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: 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.
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 Assurance? Strict 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.
Samples? Most products provide free samples for quality evaluation, shipping cost should be paid by customers.
Factory Audit? Factory audit welcome. Please make an appointment in advance.
MOQ? No MOQ. Small order is acceptable.
Delivery Time? If within stock, three days delivery guaranteed.
Transportation? By Express (FedEx, DHL), by Air, by Sea.
Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.
Custom Synthesis? Can provide custom synthesis services to best fit your research needs.
Payment Terms? Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc.
Risk Codes 36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description S22 - Do not breathe dust.
S24/25 - Avoid contact with skin and eyes.
S44 -
S35 - This material and its container must be disposed of in a safe way.
S28 - After contact with skin, wash immediately with plenty of soap-suds.
S7 - Keep container tightly closed.
S4 - Keep away from living quarters.
WGK Germany 3
HS Code 2922491990
L-Aspartic Acid 4-tert-Butyl Ester (H-Asp(OtBu)-OH) (CAS: 3057-74-7) is an aspartic acid derivative. Amino acids and derivatives, used in peptide synthesis, organic synthesis intermediates, pharmaceutical intermediates, biochemical reagents, chemical reagents.
