The product is advised to be dissolved in anoxic water. The use of distilled water is not recommended, as it can absorb more oxygen from the atmosphere.
T4425
(6R)-5,6,7,8-Tetrahydrobiopterin dihydrochloride
≥98% (HPLC), powder
Synonym(s):
(6R)-BH4
Sign In to View Organizational & Contract Pricing.
Select a Size
Change View
| Size/SKU | Availability | Price |
|---|---|---|
5 mg | Available to ship onSeptember 08, 2026fromMILWAUKEE | $92.70 |
25 mg | Available to ship onSeptember 08, 2026fromMILWAUKEE | $306.00 |
100 mg | Estimated to ship onDecember 17, 2026fromMILWAUKEE | $1,010.00 |
About This Item
Empirical Formula (Hill Notation):
C9H15N5O3 · 2HCl
CAS Number:
Molecular Weight:
314.17
UNSPSC Code:
12352200
PubChem Substance ID:
NACRES:
NA.77
MDL number:
Product Name
(6R)-5,6,7,8-Tetrahydrobiopterin dihydrochloride,
Quality Segment
solubility
water, oxygen free: soluble 19.60-20.40 mg/mL, clear to slightly hazy, colorless to faintly yellow
storage temp.
−20°C
SMILES string
Cl.Cl.C[C@H](O)[C@H](O)[C@H]1CNC2=C(N1)C(=O)NC(N)=N2
InChI
1S/C9H15N5O3.2ClH/c1-3(15)6(16)4-2-11-7-5(12-4)8(17)14-9(10)13-7;;/h3-4,6,12,15-16H,2H2,1H3,(H4,10,11,13,14,17);2*1H/t3-,4+,6-;;/m0../s1
InChI key
RKSUYBCOVNCALL-NTVURLEBSA-N
Gene Information
human ... PAH(5053)
General description
Tetrahydrobiopterin is a natural cofactor for phenylalanine hydroxylase, tyrosine hydroxylase, tryptophan hydroxylase, nitric oxide synthase and alkylglycerol monooxygenase.
Application
(6R)-BH4 has been used as a buffer component for assaying tyrosine hydroxylase enzyme activity in mouse brain tissues. (6R)-BH4 has also been identified as an activator compound from a LOPAC library screen using a fluorogenic α-glucosidase assay.
Biochem/physiol Actions
Lack of tetrahydrobiopterin may cause hyperphenylalaninemia. Diseases like, Parkinson′s, autism, depression and Alzheimer′s shows low concentration of tetrahydrobiopterin in the cerebrospinal fluid. This coenzyme participates in dopamine (DA) synthesis.
Features and Benefits
This compound is featured on the Dopamine, Norepinephrine and Epinephrine Synthesis and Nitric Oxide Synthases pages of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.
Preparation Note
(6R)-5,6,7,8-Tetrahydrobiopterin dihydrochloride ((6R)-BH4 ) is soluble in oxygen free water at 19.60 - 20.40 mg/ml and yields a clear to slightly hazy, colorless to faint yellow solution.
1 of 1
This Item | |||
|---|---|---|---|
| description - | description NADPH-diaphorase substrate that competitively inhibits nitric oxide synthase (IC50 = 3-4 µM). | description Inhibits calmodulin-dependent stimulation of cyclic nucleotide phosphodiesterase (IC50 = 17 µM). | description The Nitric Oxide Synthase, Neuronal Inhibitor I, also referenced under CAS 357965-99-2, controls the biological activity of neuronal Nitric Oxide Synthase. This small molecule/inhibitor is primarily used for Inflammation/Immunology applications. |
| Quality Level 200 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
| storage temp. −20°C | storage temp. 2-8°C | storage temp. 10-30°C | storage temp. −20°C |
| solubility water, oxygen free: soluble 19.60-20.40 mg/mL, clear to slightly hazy, colorless to faintly yellow | solubility methanol: soluble, water: soluble | solubility water: 50 mg/mL, methanol: 10 mg/mL | solubility water: 1 mg/mL |
| Gene Information human ... PAH(5053) | Gene Information - | Gene Information - | Gene Information - |
Choose from one of the most recent versions:
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
-
Is the product T4425 (CAS 69056-38-8) soluble in distilled water?
1 answer-
Helpful?
-
-
How should a solution of (6R)-5,6,7,8-tetrahydrobiopterin (hydrochloride) be stored? How long is it good for?
1 answer-
Tetrahydrobiopterin reacts with oxygen, particularly in neutral and alkaline solutions. The product should be reconstituted in oxygen-free water. Tetrahydrobiopterin solutions become yellow but are stable for several weeks at -20°C when prepared at 20-40 mg/mL in 0.1 N HCl.
Please review the product data sheet for more information on this product:
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/277/129/t4425pis.pdfHelpful?
-