SAFETY DATA SHEET

Erythrosin B, C.I. 45430

Version 1Last reviewed 23 February 2026Catalogue: C098, C0981, C0985

1. Identification

Product Identifiers

Product Name: Erythrosin B, C.I. 45430
Other Names: Acid Red 51; C.I. 45430; 9-(o-Carboxyphenyl)-6-hydroxy-2,4,5,7-tetraiodo-3Hxanthene-3-one disodium salt; Disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9- yl) benzoate; Fluorescein, 2',4',5',7'-te
Product Number(s): C098, C0981, C0985
CAS Number: 16423-68-0

Recommended use of the chemical and restriction on use

Laboratory use.

Company Details

ProSciTech Pty Ltd
11 Carlton Street
KIRWAN QLD 4817
Australia
(07) 4773 9444
pst@proscitech.com
proscitech.com.au

Emergency Contact Details

ProSciTech Pty Ltd
11 Carlton Street
KIRWAN QLD 4817
Australia
(07) 4773 9444
pst@proscitech.com
proscitech.com.au

2. Hazards Identification

Classification of the substance or mixture

Chronic aquatic toxicity (Category 4)
Acute toxicity, Oral (Category 4)

Label Elements

Signal Words: Warning
Hazard Statement(s): H302: Harmful if swallowed.
H413: May cause long term effects to aquatic life.
Precautionary Statement(s): P264: wash skin thoroughly after handling.
P330: Rinse mouth.
P270: Do not drink, eat, smoke, when using this product.
P273: Avoid release into the environment.
P301 ± P312:If Swallowed: Call Poison Center or doctor/physician if you feel unwell
P501: Dispose of contents/container to an approved waste disposal plant.

Primary route(s) of entry

Not available.

Human Health

Inhalation: Harmful by inhalation.
Ingestion: Harmful if swallowed.
Eyes: Risk of serious damage to eyes.
Skin: Harmful in contact with skin.

Environment

No further relevant information available.

3. Composition / Information on Ingredients

Name	CAS No.	Content (w/w)	Classification
Disodium 2-(2,4,5,7-tetraiodo-6-oxido-3-oxoxanthen-9-yl)benzoate-	16423-68-0	90-100%	-

4. First Aid Measures

Ingestion: Do not induce vomiting without medical advice. Rinse with water. Consult physician.
Inhalation: Move to fresh air. Consult a physician.
Skin Contact: Rinse with plenty of soap & water and seek medical advice.
Eye Contact: In the case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
Other Information: Treat symptomatically and supportively.

5. Firefighting Measures

Suitable extinguishing equipment

Fire: In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
HAZCHEM: Not available.

Special protective equipment and precautions for fire fighters

During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.

6. Accidental Release Measures

Personal precautions, protective equipment and emergency procedures: Use proper personal protective equipment as indicated in Section 8.
Environmental precautions: Not available.
Methods and materials for containment and clean up: Clean up spills immediately, observing precautions in the Protective Equipment Section. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.

7. Handling and Storage

Precautions for safe handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Do not ingest or inhale. Keep from contact with moist air and steam. Do not breathe dust.
Conditions for safe storage: Keep container closed when not in use. Store protected from moisture. Store in a cool, dry area away from incompatible substances.

8. Exposure Controls / Personal Protection

Exposure Standards

Material	TWA ppm	TWA mg/m³	STEL ppm	STEL mg/m³
Erythrosin B	None listed	None listed	None listed	None listed

Engineering controls: Facilities storing or utilising this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low.

Personal protective equipment

Eye and face protection: Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and fact protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin protection: Wear appropriate protective gloves to prevent skin exposure. Nitrile rubber 0.11 mm thick.
Body protection: Wear appropriate protective clothing (Labcoat and overalls) to prevent skin exposure.
Respiratory protection: Follow the OSHA respirator regulations in 29 CFR 1910.134 or European Standard EN 149. P95 (US) particle respirator Use NIOSH or European Standard EN 149 approved respirator when necessary.

9. Physical and Chemical Properties

General information

Appearance: Dark red to maroon to brown powder.
Odour: None reported.
pH: Not available.
Vapour Pressure: Not available.
Density: Not available.
Boiling Point: Not available.
Melting Point: Not available.
Solubility: Soluble in water.
Specific Gravity of Density: Not available.
Flash Point: Not applicable.
Flammable (Explosive) Limits: Not applicable.
Ignition Temperature: Not applicable.
Formula: C20H6I4.Na2O5

10. Stability and Reactivity

Reactivity: No further relevant information available.
Chemical stability: Stable under normal temperatures and pressures.
Possibility of hazardous reactions: During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Conditions to avoid: Incompatible materials, strong oxidants, exposure to moist air or water.
Incompatible materials: Moisture, strong oxidising agents.

11. Toxicological Information

Acute effects: LD50/LC50: Oral, rat - 1,840 mg/kg - convulsions/effect on seizure threshold.
Eye contact: No further relevant information available.
Skin contact: No further relevant information available.
Ingestion: No further relevant information available.
Inhalation: No further relevant information available.
Toxicity and irritation: Hypfunction of thyroid, Stomach - Irregularities - based on human evidence.

12. Ecological Information

Ecotoxicity: Fish LC50 - Oryzias latipes - 500 mg/l - 48 h
Persistence and degradability: No further relevant information available.
Bioaccumulative potential: No further relevant information available.
Other adverse effects: No further relevant information available.

13. Disposal Considerations

General information

Chemical waste generators must determine whether a discarded chemical is classified as a hazardous waste. US EPA guidelines for the classification determination are listed in 40 CFR Parts 261.3. Additionally, waste generators must consult state and local hazardous waste regulations to ensure complete and accurate classification.

14. Transport Information

ADG label required

HAZCHEM: Not available.
UN Number: None.
Proper shipping name: Not regulated.
Transport hazard class: 0
Packing group: None.
Environmental hazard: Water Hazard class 1 (Self-assessment): slightly hazardous for water.
Special precautions for users: No information available.
Additional information: No information available.

15. Regulatory Information

Poisons Schedule Number: No information available.
Other Information: No further relevant information available.

16. Other Information

SDS preparation date: 23 February 2026
Comments: This information is based on our present knowledge. However, this shall not constitute a guarantee for any specific product features and shall not establish a legally valid contractual relationship.
References: Dudley chemical corporation; ERYTHROSIN B Safety Data Sheet. Available from http://www.dudley-chem.com/