Our company produces refined naphthalene, which has been tested according to national standards and has a crystallization point of 76, but the color is red (we use imported industrial naphthalene with a crystallization point of 73-7). May I ask which expert can help solve this problem.

萘，又稱(chēng)并萘，是一種無(wú)色有光澤的片狀晶體。 不溶物水，易升華，能隨水蒸氣蒸發(fā)，有特別味道。 精萘是工業(yè)上最舉足輕重的稠環(huán)芳烴，可用于生產(chǎn)染料的中間體橡膠助劑和殺蟲(chóng)劑。

Naphthalene, also known as naphthalene, is a colorless and glossy sheet-like crystal. Insoluble water, easily sublimated, can evaporate with water vapor, and has a special taste. Refined naphthalene is the most important polycyclic aromatic hydrocarbon in industry, which can be used as an intermediate in the production of dyes, rubber additives, and insecticides.

精子是什么顏色的在正常情況下，如果是定期排精的男性，精液應(yīng)當(dāng)是乳白色的;如果比較長(zhǎng)的時(shí)間沒(méi)有排精，精液的顏色會(huì)呈淡黃色;如果精液的顏色發(fā)紅，可能精液內(nèi)有血;如果精液的顏色很黃，很稠，則可能是有膿細(xì)胞了。正常的精液呈乳白色或淡黃色。

What color is the sperm? Under normal circumstances, if it is a male who regularly ejaculates, the semen should be milky white; If there is no ejaculation for a relatively long time, the color of the semen will be light yellow; If the color of semen turns red, there may be blood in the semen; If the color of the semen is very yellow and thick, there may be pus cells. Normal semen is milky white or light yellow.

一個(gè)男人正常的精液是淡黃或者乳白色，精液的顏色提示生殖系統(tǒng)是否健康，有些男性發(fā)現(xiàn)自己精液是黃色的很是擔(dān)憂(yōu)害怕，又很疑惑，哪些原因會(huì)導(dǎo)致精液變黃，男人精液發(fā)黃大多跟這些原因有關(guān)。

A man's normal semen is light yellow or milky white, and the color of the semen indicates whether the reproductive system is healthy. Some men are worried, afraid, and confused about what causes their semen to turn yellow. Most men's semen turning yellow is related to these reasons.

"精液顏色什么樣正常精液的顏色一般多為乳白色或淡黃色，但如果患者長(zhǎng)期沒(méi)有同房，沒(méi)有射精，精液的顏色可以偏黃色。如果是過(guò)頻的射精，精液的顏色又可以是淡白色，所以要根據(jù)實(shí)際情況來(lái)判定精液顏色是不是正常。

What is the color of semen? The normal color of semen is usually milky white or light yellow, but if the patient has not had sexual intercourse for a long time and has not ejaculated, the color of semen can turn yellow. If the ejaculation is too frequent, the color of semen can also be light white, so it is necessary to determine whether the semen color is normal based on the actual situation.

健康的精液顏色可以是乳白色灰白色或者淡黃色黃色。精液的顏色變化其實(shí)與禁欲時(shí)間有關(guān)，有些男性比較頻繁，精液顏色可能偏乳白呈水樣。如果男性比較少，長(zhǎng)時(shí)間沒(méi)有排精，精液的顏色會(huì)偏黃，呈果凍狀或者顆粒狀。

A healthy semen color can be milky white, gray white, or light yellow. The color change of semen is actually related to abstinence time, and some men are more frequent, and the semen color may be milky white and watery. If there are relatively few males who have not ejaculated for a long time, the color of the semen will be yellowish, jelly like or granular.

萘由兩個(gè)苯環(huán)構(gòu)成的最簡(jiǎn)單的稠環(huán)芳香烴，俗稱(chēng)“衛(wèi)生球”。是煤焦油加工的主要產(chǎn)品之一。萘在工業(yè)上以粗萘(工業(yè)萘和壓榨萘)和精萘等產(chǎn)品形式出現(xiàn)。萘的分子式為C10H8，分子量為1217。

Naphthalene is the simplest condensed aromatic hydrocarbon composed of two benzene rings, commonly known as the "sanitary sphere". It is one of the main products in coal tar processing. Naphthalene appears in industry in the form of crude naphthalene (industrial naphthalene and pressed naphthalene) and refined naphthalene. The molecular formula of naphthalene is C10H8, with a molecular weight of 1217.

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