Methanol:Tetrahydrofuran:15 Mix sunscreens in water | Cosmetics

View Certificate Essential Information Magnitude Information Related Products

Methanol:Tetrahydrofuran:15 Mix sunscreens in water View Certificate

This product can be used as a working standard for daily analysis and testing; It can also be used for laboratory quality control such as test method evaluation and instrument calibration.

1、Traceability and value determination method

The standard value is verified by . The traceability of the product quantity value is ensured through the use of production, measurement methods and measuring instruments that meet the requirements of metrological characteristics.

2、Characteristic value and expanded uncertainty

No	Analyte	CAS	Standard value	Uncertainty(k=2)	Matrix
1	2-Phenylbenzimidazole-5-sulfonic acid	27503-81-7	30μg/mL	6%	Methanol:Tetrahydrofuran:Water:Perchloric acid(250:450:300:0.2)
2	2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid	4065-45-6	100μg/mL	4%
3	4-Aminobenzoic acid	150-13-0	30μg/mL	6%
4	Oxybenzone	131-57-7	100μg/mL	4%
5	miloxate	71617-10-2	100μg/mL	4%
6	3-(4-Methylbenzyliden)camphor	36861-47-9	60μg/mL	6%
7	Sundown	21245-02-3	100μg/mL	4%
8	Avobenzone	70356-09-1	300μg/mL	4%
9	Octocrilene	6197-30-4	145μg/mL	4%
10	Octyl 4-methoxycinnamate	5466-77-3	100μg/mL	4%
11	2-Ethylhexyl salicylate	118-60-5	500μg/mL	4%
12	Homosalate	118-56-9	500μg/mL	4%
13	Octyl triazone	88122-99-0	50μg/mL	6%
14	Ultraviolet Absorbent UV-360	103597-45-1	100μg/mL	4%
15	BEMT	187393-00-6	100μg/mL	4%

3、Uniformity test and stability investigation

According to ISO 33405 metrology technical specification, the samples are randomly sampled after packaging, and the uniformity test and long-term stability tracking of the product are carried out by . The results show that the uniformity meets the F test rules and has good stability.

The quantitative value of this product is valid for 12 months from the date of value determination. The research and development unit will continue to track and monitor the stability of the product. If the value changes during the validity period, the user will be notified in time.

4、Packaging storage and use

Packaging: This product is packaged in Brown ampoule, with the specification of 1.2mL. It should be protected from breaking when carried or transported.

Storage: at 2-8 ℃ and in the sealed and light-proof conditions. Before use, it should be （20±3）℃℃ fully shaken to ensure homogeneity. This product should be used as soon as possible after being opened. During the use process, strict precautions should be taken to prevent contamination.

Form	Liquid State
Stroma	Methanol:Tetrahydrofuran:Water:Perchloric acid(250:450:300:0.2)
Packing	Brown ampoule
Save conditions	Refrigeration(4±4）℃ Store airtight and away from light place.Before use, the temperature should be adjusted to at 2-8 ℃，shake uniformity.Used up after opening,prevent contamination during use.