![CAS 521-31-3 Luminol [Chemiluminescence Reagent] molecular structure](https://starshinechemical.com/wp-content/uploads/2022/03/a5301-jpgcontextbwfzdgvyfhjvb3r8nda3otj8aw1hz2uvanblz3xozgqvadi2lzg5mjg1mtqynzc0mdyvqtuzmdeuanbnfgq5mwfkzdmzmzmxntuynjuxzwy1otg3ywu1zdgwmdy2nza5zduxyjhhowuzmznmyjzimjnlzdfkntfjmdm4mwi.jpeg)
CAS RN: 521-31-3
Luminol [Chemiluminescence Reagent]
Product Availability
Choose a grade to view its available package options.
8 package records8 with current stock1 grade group
| Batch No. | Package | Availability | Warehouse | Inquiry |
|---|---|---|---|---|
| Batchno.20251016 | 100g | In stock | Shanghai, Tianjin, Chengdu | Inquiry |
| Batchno.20250815 | 100mg | In stock | Shanghai, Tianjin | Inquiry |
| Batchno.20260627 | 10g | In stock | Shanghai, Shenzhen, Tianjin, Chengdu | Inquiry |
| Batchno.20251209 | 1kg | In stock | Shanghai | Inquiry |
| Batchno.20251105 | 1mg | In stock | Shanghai, Tianjin, Wuhan | Inquiry |
| Batchno.20250905 | 25g | In stock | Shanghai, Shenzhen, Tianjin, Wuhan, Chengdu | Inquiry |
| Batchno.20251221 | 500g | In stock | Shanghai, Shenzhen, Tianjin, Wuhan, Chengdu | Inquiry |
| Batchno.20250527 | 5g | In stock | Shanghai, Shenzhen, Tianjin, Wuhan, Chengdu | Inquiry |
- Product code: SSC-159185
Verified Factory Data
Supply Overview & Packaging Options
Packaging options, recorded purity, stock quantity and ship-from location below are generated from the current factory data table for this CAS.
- Pack sizes on record: 25g, 100g, 10g, 5g, 500g
- Available purity: >98%
- Inventory rows with stock: 4
- Bulk packaging: confirmed by inquiry
Available Pack Sizes & Stock
Specific stock quantities are shown below. Price is not displayed online and is confirmed by inquiry.
| Pack Size | Recorded Purity | Available Qty | Ship From | Inquiry |
|---|---|---|---|---|
| 25g | >98% | 5 In Stock | Hong Kong | Inquiry |
| 100g | >98% | 4 In Stock | Beijing | Inquiry |
| 10g | >98% | 3 In Stock | Shanghai | Inquiry |
| 5g | >98% | 2 In Stock | Hong Kong | Inquiry |
| 500g | >98% | 0 Out of Stock | Shanghai | Inquiry |
521-31-3 / 5-amino-2,3-dihydrophthalazine-1,4-dione
Basic Information
CAS
521-31-3
Multi CAS
Yes
Molecular Formula
C8H7N3O2
Molecular Weight
177.160000
Exact Mass
177.053826
InChI
InChI=1S/C8H7N3O2/c9-5-3-1-2-4-6(5)8(13)11-10-7(4)12/h1-3H,9H2,(H,10,12)(H,11,13)
InChIKey
HWYHZTIRURJOHG-UHFFFAOYSA-N
Physical Properties
Melting Point
606 to 608 °F (NTP, 1992)
Physical Description
O-aminophthalyl hydrazide appears as yellow crystals or light beige powder. (NTP, 1992)
Yellow or light beige solid; [CAMEO] Light yellow powder
State
Solid
Computed Properties
Structural Parameters
Heavy atom count
13
Aromatic heavy atom count
10
H-bond acceptors
3
H-bond donors
3
Molar refractivity
49.6
TPSA
91.74
LogP / Solubility
WLOGP
-0.2
MLOGP
-0.18
XLogP3
0.3
Consensus LogP
-0.03
Log S (ESOL)
-1.38
Class (ESOL)
Soluble
Log S (Ali)
-0.87
Class (Ali)
Very soluble
Log S (SILICOS-IT)
-0.64
Class (SILICOS-IT)
Very soluble
ADME
GI absorption
High
BBB permeant
No
P-gp substrate
No
CYP1A2 inhibitor
No
CYP2C19 inhibitor
No
CYP2C9 inhibitor
No
CYP2D6 inhibitor
No
CYP3A4 inhibitor
No
Log Kp (skin permeation)
-3.94
Drug-likeness / Medicinal Chemistry
Lipinski
Yes
Ghose
No
Veber
Yes
Egan
Yes
Muegge
No
Bioavailability score
0.55
Brenk alerts
1
Leadlikeness
No
Synthetic Accessibility
1.5
Applications of CAS 521-31-3
This compound is commonly used in life science and biochemical research, biochemistry and reagent applications, analytical chemistry and reference standard applications, laboratory reagent and synthesis applications, general chemistry research and laboratory applications. Starshine Chemical supplies CAS 521-31-3 for R&D and pilot-scale use, with flexible pack sizes and purity grades available.
Physical & Chemical Properties
| IUPAC Name | 5-amino-2,3-dihydrophthalazine-1,4-dione |
Safety Information (GHS)
Pictogram(s): GHS07. Signal word: Warning.
- H302 (15.3%): Harmful if swallowed [Warning Acute toxicity, oral]
- H315 (94.9%): Causes skin irritation [Warning Skin corrosion/irritation]
- H319 (94.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H335 (93.2%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
Precautionary statements: P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)
Request the SDS (Safety Data Sheet) for full hazard and safety documentation.
Storage & Handling
Storage: Store under inert gas. Avoid: Air Sensitive. For detailed hazard, storage and transport information, request the SDS (Safety Data Sheet) with your inquiry.
Quotation & Packaging
Prices are confirmed by inquiry. Request a quote for current pricing, minimum order quantity (MOQ) and lead time. The pack sizes listed on this page are reference options; custom pack sizes and bulk quantities are available on request.
Quality & Compliance
Specifications and purity shown on this page are based on batch records. A Certificate of Analysis (COA) is available on request. For research and further manufacturing use only — not for direct human or therapeutic use.
Customers Also Viewed
-
![CAS 128322-44-1 MCLA [Chemiluminescence Reagent] molecular structure](data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%200%200'%3E%3C/svg%3E)
MCLA [Chemiluminescence Reagent]
- CAS RN: 128322-44-1
- Product Code: ICTA5309
- Purity/Analytical method: >98.0%(HPLC)
-
10,10′-Dimethyl-9,9′-biacridinium Dinitrate [for Chemiluminescence Research]
- CAS RN: 2315-97-1
- Product Code: SSC-112671
-
10,10′-Dimethyl-9,9′-biacridinium Bis(monomethyl Terephthalate) [for Chemiluminescence Research]
- CAS RN: 469865-01-8
- Product Code: ICTB4339
-
-
-
BILOBETIN
- CAS RN: 521-32-4
- Product Code: starshine_CAS521-32-4
- Purity/Analytical method: >99.0%
![CAS 128322-44-1 MCLA [Chemiluminescence Reagent] molecular structure](https://starshinechemical.com/wp-content/uploads/2022/03/a5309-jpgcontextbwfzdgvyfhjvb3r8mjkzodh8aw1hz2uvanblz3xon2qvadm0lzg5mjg1mtq2nza2mjivqtuzmdkuanbnfdbizjm0ogq5ngvimjlizdcxyzzlowviztayy2e4ogvlmgi2oti3nwrlymvhytdjmjyymgq0zwiyyzcwmmzjodk.jpeg)
![CAS 2315-97-1 10,10′-Dimethyl-9,9′-biacridinium Dinitrate [for Chemiluminescence Research] molecular structure](https://starshinechemical.com/wp-content/uploads/2022/03/b1203-jpgcontextbwfzdgvyfhjvb3r8ndg3mjd8aw1hz2uvanblz3xozdgvadkzlzg5mjg2ndg0mjk1otgvqjeymdmuanbnfdqwmjnmndnlmtc2zgu2njq1zmy4y2iwmgjkmwnmyzmxzwrjzgm2ymnlmdk5owfinwy4ngyxytqymze4zgjkmtg.jpeg)
![CAS 469865-01-8 10,10′-Dimethyl-9,9′-biacridinium Bis(monomethyl Terephthalate) [for Chemiluminescence Research] molecular structure](https://starshinechemical.com/wp-content/uploads/2022/03/b4339-jpgcontextbwfzdgvyfhjvb3r8ndu5otf8aw1hz2uvanblz3xozwivagq3lzg5mjkwndu1nzc3ntgvqjqzmzkuanbnfdlhyzk4mdhlmdi4zta3njlhyzuzywmwmtkwyzywogewowmynzg2owrkymnkmguxnda5yzjhowu2mdrizmy5ngi.jpeg)
