Alizarin Red S

Calcium carbonate
Calcium Carbonate CAS 471-34-1
Citric Acid
Citric Acid


Alizarin Red S paramete

CAS No.: 130-22-3
MF: C14H7NaO7S
Place of Origin: china
Classification: High Purity Reagents
Model Number: LYN-130-22-3
CAS: 130-22-3
Shelf Life: 2 Years
COA: available
Appearance: Yellow - orange powder
Other Names: Alizarin red S
EINECS No.: 130-22-3
Purity: 99%
Brand Name: Lookchemical
Product name: Alizarin red S
Packing: 25kg/drum
Sample: available
Color: Yellow - orange powder

Introduction of Alizarin Red S

Alizarin red S, also known as sodium alizarin xanthate, is an anthraquinone derivative and is the sodium salt of alizarin sulfonate. Soluble in hot water and ethanol, insoluble in benzene and carbon tetrachloride.

Orange-yellow or yellow-brown powder, its aqueous solution is light yellow-brown, turns yellow after adding hydrochloric acid, and turns blue-purple after adding sodium hydroxide.

It can chelate with calcium salts in calcium carbonate or calcium phosphate to form an orange-red complex. Alizarin Red S tends to give more reliable results for staining small amounts of sediment. It is often used in combination with Fast Green or Mayer's hematoxylin staining solution to form an orange-red precipitate, which is suitable for staining tissues with a small amount of calcium salts.

Alizarin red S has been widely used as a dye-type complexing agent in spectrophotometric analysis.


Melting point  >250°C
pka  4.5, 11(at 25℃)
PH Range  4.3(yellow)-6.3(violet)
λmax  556nm, 596nm, 423nm, 546nm
storage temp.  Store at +5°C to +30°C.
solubility  H2O: soluble1mg/mL
Merck  14,8573


1.Alizarin Red S is widely used as a dye, acid-base indicator and is one of the representative dyestuffs with a complex structure as well as a large chemical oxygen demand (COD) value.

2.It is often used in woolen, worsted, carpet and blanket

3.Determination of fluoride. PH3.7 (yellow)-5.2(purple). It can produce colorimetric compounds with many metal ions for chromogenic reaction and colorimetric determination of zirconium, thorium, aluminum, Chemicalbook titanium and beryllium. Microscopic dyes, in vivo staining of nerve tissue, chromosomal staining in plant cytology, and reagents for the determination of Alopectin.

4.Biochemical research

Product service

1. Certificate Of Analysis (COA)

2. Material Safety Data Sheet (MSDS)

3. Route of synthesis (ROS)

4. Method of Aanlysis (MOA)

5. Nuclear Magnetic Resonance (NMR)

6. Packing pictures and loading video before loading

7. Free Sample

8. Factory audit


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.

After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Q1: Do you accept sample order?
A:  We will make samples before mass production, and after sample approved, we'll begin mass production. Doing 100% inspection during production, then do random inspection before packing.
Q2:  What is our advantage?
A : The series of natural extracted product are all self-developed, produced and tested. Mature production technology, strict cost control, and perfect quality assurance system, ensure the product stability and competitive price.
Q3: What’s your MOQ?
A :  Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
Q4: Do you supply product report?
A : Yes. We'll give you product analysis report before shipping.
 Q5: Is there a discount?
A :  Different quantity has different discount.
Q6: Can we visit your factory?
A :  Yes. Welcome to visit.
Q7: How to confirm the Product Quality before placing orders?
A :  You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.


H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]

H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]

H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]


Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.



Packing can be conducted according to customers' requirements.

Delivery detail

   [Delivery] 5 working days after payment.

Alizarin Red S picture

Packaging and shipping

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